Matthias Beck, Marcin Mazur, Shelemyahu Zacks. "Ordinary" Spherical Triangles: 11048. The American Mathematical Monthly, 112(7):659-660, 2005. [doi]
@article{BeckMZ05, title = {"Ordinary" Spherical Triangles: 11048}, author = {Matthias Beck and Marcin Mazur and Shelemyahu Zacks}, year = {2005}, url = {http://www.jstor.org/stable/30037562}, researchr = {https://researchr.org/publication/BeckMZ05}, cites = {0}, citedby = {0}, journal = {The American Mathematical Monthly}, volume = {112}, number = {7}, pages = {659-660}, }