@article{CRMATH_2011__349_15-16_883_0,
     author = {Radu Ignat},
     title = {Gradient vector fields with values into $ {S}^{1}$},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {883--887},
     publisher = {Elsevier},
     volume = {349},
     number = {15-16},
     year = {2011},
     doi = {10.1016/j.crma.2011.07.024},
     language = {en},
}