Girik, E. A., Гирик, Е. А., & Гирик, Е. А. (1993). On the existence of vector fields with a given set of singular points on a two-dimensional closed oriented manifold. Institute of Mathematics, NAS of Ukraine.
Chicago-Zitierstil (17. Ausg.)Girik, E. A., Е. А Гирик, und Е. А Гирик. On the Existence of Vector Fields with a Given Set of Singular Points on a Two-dimensional Closed Oriented Manifold. Institute of Mathematics, NAS of Ukraine, 1993.
MLA-Zitierstil (8. Ausg.)Girik, E. A., et al. On the Existence of Vector Fields with a Given Set of Singular Points on a Two-dimensional Closed Oriented Manifold. Institute of Mathematics, NAS of Ukraine, 1993.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.