METHOD OF STATIONARY PHASE Article ISAKOVA E.K. Doklady Akademii nauk SSSR. Mezhdunarodnaya Kniga, Moscow, Russian Federation. Vol. 237. 1977. P. 28-31
STRING-LIKE SOLUTIONS TO KLEIN-GORDON NONLINEAR EQUATION Article TERLETSKII J.P. Doklady Akademii nauk SSSR. Mezhdunarodnaya Kniga, Moscow, Russian Federation. Vol. 236. 1977. P. 828-829