V. A. Venikov, E. V. Putyatin ; Translated from Russian by B. Nikolayev. N. Lashko, S. Lashko ; translated from the Russian by B. Nikolaev. Yu.N. Demkov and V.N. Ostrovskii ; translated from Russian by A.M. Ermolaev. S. M. Nikolsky, M. K. Potapov ; translated from Russian by Leonid Levant. V. I. Fedorov, P. I. Shilov ; translated from the Russian by V. V. Kuznetsov. [by] O. A. Oleinik and E. V. Radkevic. Translated from Russian by Paul C. Fife. V. A. Ugarov, translated from Russian by Yuri Atanov. V. Z. Parton, P. I. Perlin ; translated from the Russian by Ram. S. Wadhwa. R. V. Polovin and V. P. Demutskii ; translated from Russian by D. ter Haar. O. V. Rudenko and S. I. Soluyan ; translated from Russian by Robert T. Beyer.