@article{VMUMM_2002_1_a10,
     author = {P. Sworowski and V. A. Skvortsov},
     title = {On a variational measure defined by an approximate differential basis},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {54--57},
     publisher = {mathdoc},
     number = {1},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2002_1_a10/}
}