gistfile1.txt

I don't know where to start with a single good article, but look at:

http://geekfeminism.wikia.com/wiki/Geek_Feminism_Wiki

http://geekfeminism.org/ (check the tags for specifically math-related ones)

http://ashedryden.com/ -- she has a "101-level reader" post at http://ashedryden.com/blog/the-101level-reader-books-to-help-you-better-understand-your-biases-and-the-lived-experiences

http://kronda.com/tech-needs-more-empathy

https://medium.com/@shanley

http://www.slideshare.net/terriko/how-does-biology-explain-the-low-numbers-of-women-in-cs-hint-it-doesnt?imm_mid=0adcff&cmp=em-strata-na-na-newsltr_20130807_elist

https://pinboard.in/u:mappings/t:women-in-tech/

http://alyx.io/educational-resources/gender.html#workplaceeducationbiology (there's a link there to a paper on the effect of stereotype threat on women's math performance).