TY - JOUR AU - I. B. Badriev AU - O. V. Pankratova TI - Mixed finite-element method for nonlinear stationary problems of seepage theory JO - Issledovaniya po Prikladnoi Matematike i Informatike PY - 1989 SP - 17 EP - 34 VL - 16 IS - 16 UR - http://geodesic.mathdoc.fr/item/KUIPM_1989_16_16_a1/ LA - ru ID - KUIPM_1989_16_16_a1 ER -