by S.M. Bilenky ; translated by G.B. Pontecorvo. by A.G. Sitenko ; translated by O.D. Kocherga. by M.I. Klinger ; translated by J.B. Sykes. by J. C. Simon ; translated by J. Howlett. by S. M. Bilenky ; translated and edited by Frances Pardee. by Anna Livanova ; translated by J.B. Sykes. by Dr. E. Sellin ; translated by W. Montgomery. by O. G. Tietjens ; translated by L. Rosenhead. by Chen Jie ; translated by Chen Zhen. by Ma Hong ; translated by Yang Lin.