@article{MZM_1996_59_3_a7,
     author = {V. A. Krasnov},
     title = {On~degeneration of $M$-varieties},
     journal = {Matemati\v{c}eskie zametki},
     pages = {396--401},
     publisher = {mathdoc},
     volume = {59},
     number = {3},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1996_59_3_a7/}
}