For citations:
Polyanin A.D. Method of Functional Separation of Variables Can Give More Exact Solutions than Methods Based on a Single Differential Constraint. Vestnik natsional'nogo issledovatel'skogo yadernogo universiteta "MIFI". 2019;8(5):445-452. (In Russ.) https://doi.org/10.1134/S2304487X19050067