Voir la notice de l'article provenant de la source Math-Net.Ru
@article{TRSPY_1947_20_a0, author = {L. A. Lusternik and V. A. Ditkin}, title = {Preface}, journal = {Informatics and Automation}, pages = {5}, publisher = {mathdoc}, volume = {20}, year = {1947}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1947_20_a0/} }
L. A. Lusternik; V. A. Ditkin. Preface. Informatics and Automation, Collected Works, Department of approximate calculations of the Mathematical Institute, USSR Academy of Sciences, Tome 20 (1947). http://geodesic.mathdoc.fr/item/TRSPY_1947_20_a0/