1. Ruggiero, M.A.; Gordon, D.P.; Orrell, T.M.; Bailly, N.; Bourgoin, T.; Brusca, R.C.; Cavalier-Smith, T.; Guiry, M.D.; Kirk, P.M. A Higher Level Classification of All Living Organisms. PLoS One 2015, 10, e0119248.
2. Sánchez Capa, M.; Mestanza-Ramón, C.; Sánchez Capa, I. Perspectiva de conservación del suelo en la Amazonía ecuatoriana. Green World J. 2020, 3, 009. Disponible en: https://www.greenworldjournal.com/doi-022-wgj-2020.
3. Molino, S. Helechos, la belleza sin flores. Foresta 2020, 70–77.
4. Praveen, A.; Pandey, V.C. Pteridophytes in phytoremediation. Environ. Geochem. Health 2020, 42, 2399–2411. doi:10.1007/s10653-019-00425-0.
5. Carlos, M.; Maritza, S. Community Tourism In Ecuador: A Special Case In The Rio Indillama Community, Yasuní National Park. Int. J. Eng. Res. 2019, V8. doi:10.17577/ijertv8is060413.
6. Ramón, C.M.; Villacís, M.T.; Campaña, D.L.; García, A.C.; Calderón, E.P.; Gutiérrez, M.J.; Velasco, A.A.; Guamán, F.G.; Naveda, N.O. Natural Protected Areas in Ecuador, a Potential of Biodiversity for the Tourism.
7. Mestanza, C.; Saavedra, H.F.; Gaibor, I.D.; Zaquinaula, M.A.; Váscones, R.L.; Pacheco, O.M. Conflict and Impacts Generated by the Filming of Discovery Channel's Reality Series "Naked and Afraid" in the Amazon: A Special Case in the Cuyabeno Wildlife Reserve, Ecuador. Sustainability 2019, 11, 50.
8. Goswami, H.K.; Sen, K.; Mukhopadhyay, R. Pteridophytes: evolutionary boon as medicinal plants. Plant Genet. Resour. 2016, 14, 328–355. doi:10.1017/S1479262116000290.
9. Chang, J.-S.; Yoon, I.-H.; Kim, K.-W. Heavy metal and arsenic accumulating fern species as potential ecological indicators in As-contaminated abandoned mines. Ecol. Indic. 2009, 9, 1275–1279. doi:10.1016/j.ecolind.2009.03.011.
10. Mestanza-Ramón, C.; Sanchez Capa, M.; Figueroa Saavedra, H.; Rojas Paredes, J. Integrated Coastal Zone Management in Continental Ecuador and Galapagos Islands: Challenges and Opportunities in a Changing Tourism and Economic Context. Sustainability 2019, 11.
11. Takashima-Oliveira, T.; Medeiros, P.; Tavares Martins, A. Bryophyte communities across the ecological succession process in the Caxiuanã National Forest, Pará, Brazil. An. Acad. Bras. Cienc. 2020, 92. doi:10.1590/0001-3765202020180626.
12. Sofowora, A.; Ogunbodede, E.; Onayade, A. The role and place of medicinal plants in the strategies for disease prevention. African J. Tradit. Complement. Altern. Med. AJTCAM 2013, 10, 210–229. doi:10.4314/ajtcam.v10i5.2.
13. Asanza, M.; Reyes, D.; Cruz, L.C.G. Etnobotánica de helechos del nororiente ecuatoriano. Rev. Amaz. Cienc. y Tecnol. 2012, 1, 186–209.
14. Pitman, N. Guía del patrimonio de áreas naturales protegidas del Ecuador. 2002, 1–8.
15. MAE-SNAP-SUIA. Áreas Protegidas SNAP, Ecuador.
16. Mestanza-Ramón, C.; Henkanaththegedara, S.M.; Vásconez Duchicela, P.; Vargas Tierras, Y.; Sánchez Capa, M.; Constante Mejía, D.; Jimenez Gutierrez, M.; Charco Guamán, M.; Mestanza Ramón, P. In-Situ and Ex-Situ Biodiversity Conservation in Ecuador: A Review of Policies, Actions and Challenges. Diversity 2020, 12.
17. Galicia Alarcón, L.A.; Balderrama Trápaga, J.A.; Edel Navarro, R. Validez de contenido por juicio de expertos: propuesta de una herramienta virtual. Apertura 2017, 9, 42–53.
18. Lerman, A. Types of Interviews, Types of Listening. In The Non-Disclosing Patient: A Clinician's Guide; Lerman, A., Ed.; Springer International Publishing: Cham, 2020; pp. 17–26. ISBN 978-3-030-48614-3.
19. Kessler, M. Pteridophyte species richness in Andean forests in Bolivia. Biodivers. Conserv. 2001, 10, 1473–1495. doi:10.1023/A:1011811224595.
20. Watermeyer, K.; Guillera-Arroita, G.; Bal, P.; Burgass, M.; Bland, L.; Collen, B.; Hallam, C.; Kelly, L.; Mccarthy, M.; Regan, T.; et al. Using decision science to evaluate global biodiversity indices. Conserv. Biol. 2020, 35. doi:10.1111/cobi.13574.
21. Storch, D.; Šizling, A.L. The Concept of Taxon Invariance in Ecology: Do Diversity Patterns Vary with Changes in Taxonomic Resolution? Folia Geobot. 2008, 43, 329–344.
22. Cincotta, P.M.; Giordano, C.M.; Alves Silva, R.; Beaugé, C. The Shannon entropy: An efficient indicator of dynamical stability. Phys. D Nonlinear Phenom. 2021, 417, 132816. doi:10.1016/j.physd.2020.132816.
23. Gregorius, H.-R.; Gillet, E.M. Generalized Simpson-diversity. Ecol. Modell. 2008, 211, 90–96. doi:10.1016/j.ecolmodel.2007.08.026.
24. Beisel, J.-N.; Moreteau, J.-C. A simple formula for calculating the lower limit of Shannon's diversity index. Ecol. Modell. 1997, 99, 289–292. doi:10.1016/S0304-3800(97)01954-6.
25. Robles Garrote, P.; Rojas, M. La validación por juicio de expertos: dos investigaciones cualitativas en Lingüística Aplicada. 2015.
26. Barrios-Morales, F.; Alanís-Méndez, J.L.; Carvajal-Hernández, C.I. Diversidad de helechos y licopodios en el área privada de conservación Talhpan, Papantla, Veracruz, México. Polibotánica 2019, 1–12.
27. Dai, X.; Chen, C.; Li, Z.; Wang, X. Taxonomic, Phylogenetic, and Functional Diversity of Ferns at Three Differently Disturbed Sites in Longnan County, China. Diversity 2020, 12.
28. Majuakim, L.; Anthony, F. Diversity and ecology of ferns on Mount Alab, Crocker Range Park, Sabah, Malaysia. 2019, 68, 167–176.