@article{VMUMM_1988_4_a0,
     author = {B. S. Kashin and M. K. Potapov},
     title = {Petr {Lavrent'evich} {Ul'yanov} (on the occasion of his sixtieth birthday)},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {3--5},
     publisher = {mathdoc},
     number = {4},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1988_4_a0/}
}