%0 Journal Article
%A F. Z. Ziatdinov
%T Linear differential operators of second order in a~Hilbert space of vector functions with values in an abstract separable Hilbert space
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1960
%P 89-100
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1960_4_a9/
%G ru
%F IVM_1960_4_a9