Just created a pull-request; I added links to some articles and sections hosted on Paul's Online Notes page (http://tutorial.math.lamar.edu http://tutorial.math

Just created a pull-request; I added links to some articles and sections hosted on Paul's Online Notes page (http://tutorial.math.lamar.edu http://tutorial.math.lamar.edu). This site helped me quite a lot during my studies, and I'm sure the same holds for a lot of other students and professionals :)