Alexander Kolpakov, Sinai Robins. Spherical tetrahedra with rational volume, and spherical Pythagorean triples. Math. Comput., 89(324):2031-2046, 2020. [doi]
@article{KolpakovR20,
title = {Spherical tetrahedra with rational volume, and spherical Pythagorean triples},
author = {Alexander Kolpakov and Sinai Robins},
year = {2020},
doi = {10.1090/mcom/3496},
url = {https://doi.org/10.1090/mcom/3496},
researchr = {https://researchr.org/publication/KolpakovR20},
cites = {0},
citedby = {0},
journal = {Math. Comput.},
volume = {89},
number = {324},
pages = {2031-2046},
}