Chernega, Vladimir N.
Man’ko, Margarita A.
Man’ko, Vladimir I.
Article History
Received: 7 June 2020
First Online: 16 September 2020
Change Date: 4 January 2021
Change Type: Correction
Change Details: In section Acknowledgments, the Russian Science Foundation Grant No. 1871-10091 should read No. 1971-10091.