TY - JOUR AU - A. A. Egorov TI - Solutions of the differential inequality with a null Lagrangian: higher integrability and removability of singularities. I JO - Vladikavkazskij matematičeskij žurnal PY - 2014 SP - 22 EP - 37 VL - 16 IS - 3 UR - http://geodesic.mathdoc.fr/item/VMJ_2014_16_3_a2/ LA - en ID - VMJ_2014_16_3_a2 ER -