TY - JOUR AU - M. A. Mestvirishvili AU - I. T. Todorov TI - Analytic properties of the meson-nucleon vertex part and scattering amplitudes of pseudoscalar mesons in perturbation theory JO - Doklady Akademii Nauk PY - 1963 SP - 562 EP - 565 VL - 148 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1963_148_3_a21/ LA - ru ID - DAN_1963_148_3_a21 ER -