@article{articled765a0d6,
title   = {On the energy of unit vector fields with isolated singularities},
author = {Brito, Fabiano Gustavo Braga and Walczak, Pawel Grzegorz},
year = {2000},
doi = {10.4064/ap-73-3-269-274},
journal   = {Annales Polonici Mathematici}
}