BibTeX: 
@article{Pi_TranscendentalAFP,
author = {Manuel Eberl},
title = {The Transcendence of π},
journal = {Archive of Formal Proofs},
month = sep,
year = 2018,
note = {\url{http://isaafp.org/entries/Pi_Transcendental.html},
Formal proof development},
ISSN = {2150914x},
}
