[1]
Herreros, P., Ponce, M. and Veerman, J.J.P. 2017. Equators have at most countable many singularities with bounded total angle. Annales Fennici Mathematici. 42, 2 (Aug. 2017), 837–845. DOI:https://doi.org/10.5186/aasfm.2017.4251.