https://sites.google.com/site/guilleramath/
http://elpais.com/elpais/2015/03/30/ciencia/1427680761_200619.html
https://www.uam.es/personal_pdi/ciencias/cillerue/Curso/GacRSocMatEsp6.pdf
http://65.54.113.26/Author/4124722/jesus-guillera
http://biblioteca.universia.net/searchAutor.do?q=Guillera,%20Jesus
