@misc{MM_1992_4_12_a3,
     title = {State equations},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {160--188},
     publisher = {mathdoc},
     volume = {4},
     number = {12},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_1992_4_12_a3/}
}