TY - JOUR AU - H. M. Yehia AU - A. M. Hussein TI - New Families of Integrable Two-Dimensional Systems with Quartic Second Integrals JO - Russian journal of nonlinear dynamics PY - 2020 SP - 211 EP - 242 VL - 16 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ND_2020_16_2_a0/ LA - en ID - ND_2020_16_2_a0 ER -