EXACT SOLUTIONS OF NONLINEAR EQUATIONS OF FIELD IN FORM OF CIRCULARLY POLARIZED WAVES Статья TERLETSKII A.Y. Doklady Akademii nauk SSSR. Mezhdunarodnaya Kniga, Moscow, Russian Federation. Том 226. 1976. С. 292-294
ONE SINGULARLY PERTURBED SYSTEM Статья DOROFEEV I.F. Doklady Akademii nauk SSSR. Mezhdunarodnaya Kniga, Moscow, Russian Federation. Том 226. 1976. С. 500-502