Authors: Panov, Taras E.^{Aff1, Aff2, Aff3, Aff4, ID1150120228215_cor1}, Zeinikesheva, Indira K.^{Aff1, Aff4}

Superior Title: Proceedings of the Steklov Institute of Mathematics. 317(1):141-150

Authors: Abramyan, Semyon A.^Aff1, Panov, Taras E.^{Aff2, Aff3, Aff4}

Superior Title: Proceedings of the Steklov Institute of Mathematics. 305(1):1-21