@article{DE_1988_24_5_a2,
     author = {\`E. I. Grudo},
     title = {Structure of the solutions of an autonomous {Pfaffian} system with two pure imaginary roots of the characteristic equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {760--770},
     publisher = {mathdoc},
     volume = {24},
     number = {5},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_5_a2/}
}