@article{DAN_1970_190_3_a11,
     author = {\`E. Muhamadiev},
     title = {On computing the rotation of finite-dimensional vector fields},
     journal = {Doklady Akademii Nauk},
     pages = {535--537},
     publisher = {mathdoc},
     volume = {190},
     number = {3},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_190_3_a11/}
}