@article{DAN_1970_190_4_a9,
     author = {\`E. Muhamadiev},
     title = {Construction of a correct guiding function for a system of differential equations},
     journal = {Doklady Akademii Nauk},
     pages = {777--779},
     publisher = {mathdoc},
     volume = {190},
     number = {4},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_190_4_a9/}
}