Nayandeep Deka Baruah, Bruce C. Berndt, Heng Huat Chan. Ramanujan's Series for 1/π: A Survey. The American Mathematical Monthly, 116(7):567-587, 2009. [doi]
@article{BaruahBC09,
title = {Ramanujan's Series for 1/π: A Survey},
author = {Nayandeep Deka Baruah and Bruce C. Berndt and Heng Huat Chan},
year = {2009},
url = {http://www.jstor.org/stable/40391165},
researchr = {https://researchr.org/publication/BaruahBC09},
cites = {0},
citedby = {0},
journal = {The American Mathematical Monthly},
volume = {116},
number = {7},
pages = {567-587},
}