@article{TRSPY_1975_136_a0, author = {V. S. Vladimirov}, title = {Preface}, journal = {Informatics and Automation}, pages = {3--4}, publisher = {mathdoc}, volume = {136}, year = {1975}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1975_136_a0/} }