Anaya, J.G., Capulín, F. and Sánchez Garrido, M. 2021. Mappings between dendroids (fans) that (does not) preserve (non)contractibility. Revista Integración, temas de matemáticas. 39, 1 (May 2021), 1–22. DOI:https://doi.org/10.18273/revint.v39n1-2021001.