~~stoggle_buttons~~
==== Webs ====
[[http://www.articlesbyaphysicist.com/]]

==== Open Access ====

  * [[http://www.elespanol.com/ciencia/20160219/103489878_0.html|Hackers de la ciencia]]
  * [[http://naukas.com/2016/03/11/open-acces-y-quien-lo-paga/|Open Access ¿y quién lo paga?]]
  * [[http://naukas.com/2016/03/10/open-access-mandato-institucional/|Open Access y mandato institucional]]
  * [[https://youtu.be/PriwCi6SzL|Should Knowledge Be Free?"]]

==== Sitios piratas de artículos científicos ====
[[http://sci-hub.io/|Sci hub]]

[[http://golibgen.io/|golibgen.io]]

==== Libros en pdf ====

[[http://www.freebookcentre.net/]]

[[http://www.freelibros.org/]]

==== Matemáticas ====
Problemas de Olimpiada Matemática Internacional (IMO)

[[https://artofproblemsolving.com/wiki/index.php/2019_IMO_Problems/Problem_1|Art of Problem Solving]]

[[https://duckduckgo.com/?q=imo+2018+shortlist|IMO 2018 shortlist]]

==== Webs ====

[[http://mathoverflow.net/questions/10574/how-do-i-make-the-conceptual-transition-from-multivariable-calculus-to-different]]

[[https://arxiv.org/abs/math/0306194]]

[[http://integral-table.com]]

[[http://vixra.org]]

[[http://biorxiv.org]]