@article{FPM_2013_18_3_a3,
     author = {N. I. Vishnevskaya},
     title = {The {Casimir} element},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {43--52},
     publisher = {mathdoc},
     volume = {18},
     number = {3},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2013_18_3_a3/}
}