TY - JOUR AU - E. V. Bukhonova TI - The Form of Key Function in the Problem of Branching of Periodic Extremals with Resonance~1:1:1 JO - Vestnik Ûžno-Uralʹskogo gosudarstvennogo universiteta. Seriâ, Matematičeskoe modelirovanie i programmirovanie PY - 2014 SP - 23 EP - 32 VL - 7 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VYURU_2014_7_3_a1/ LA - ru ID - VYURU_2014_7_3_a1 ER -