A. B. Migdal ; translated from the Russian edition by Anthony J. Leggett. A. V. Pogorelov ; translated from the Russian by Leonid Levant. E. S. Wentzel ; translated from the Russian by Michael G. Edelev. F. P. Edneral ; translated from the Russian by V. V. Afanasyev. V. S. Shapot ; translated from the Russian by David A. Myshne. I. V. savelyev ; translated from the Russian by G. Leib. I. V. Savelyev ; translated from the Russian by G. Leib. A.V. Bitsadze ; translated from the Russian by H. Zahavi. V. A. Fock ; translated from the Russian by Eugene Yankovsky. V.V. Petrov ; translated from the Russian by A.A. Brown.