@article{DE_1967_3_7_a0,
     author = {I. T. Kiguradze},
     title = {A priori estimates for the derivatives of bounded functions satisfying second-order differential inequalities},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1043--1052},
     publisher = {mathdoc},
     volume = {3},
     number = {7},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1967_3_7_a0/}
}