@article{700055,
     title = {On some problems of the theory of the difference schemes},
     booktitle = {Proceedings of Equadiff III},
     series = {GDML\_Books},
     publisher = {Univ. J. E. Purkyn\v e - P\v r\'\i rodov\v edeck\'a fakulta},
     address = {Brno},
     year = {1973},
     pages = {43-50},
     mrnumber = {MR0349017},
     zbl = {0326.65058},
     url = {http://dml.mathdoc.fr/item/700055}
}

Janenko, N. N. On some problems of the theory of the difference schemes, dans Proceedings of Equadiff III, GDML_Books,  (1973), pp. 43-50. http://gdmltest.u-ga.fr/item/700055/