Gert Almkvist, Christian Krattenthaler, Joakim Petersson. Some New Formulas for π. Experimental Mathematics, 12(4):441-456, 2003. [doi]
@article{AlmkvistKP03,
title = {Some New Formulas for π},
author = {Gert Almkvist and Christian Krattenthaler and Joakim Petersson},
year = {2003},
doi = {10.1080/10586458.2003.10504512},
url = {http://dx.doi.org/10.1080/10586458.2003.10504512},
researchr = {https://researchr.org/publication/AlmkvistKP03},
cites = {0},
citedby = {0},
journal = {Experimental Mathematics},
volume = {12},
number = {4},
pages = {441-456},
}