For citations:

Karimov O.Kh. COERCIVE ESTIMATE AND SEPARATION THEOREM FOR ONE NONLINEAR DIFFERENTIAL OPERATOR IN A HILBERT SPACE. Chebyshevskii Sbornik. 2017;18(4):245-254. (In Russ.) https://doi.org/10.22405/2226-8383-2017-18-4-245-254