@article{IVM_1972_2_a4,
     author = {M. B. Dikhtyar'},
     title = {On the general theory of partial $\mathfrak P$-operatives},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {33--43},
     publisher = {mathdoc},
     number = {2},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1972_2_a4/}
}