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@article{TM_1980_152_a0, author = {S. S. Ryshkov}, title = {Editor's preface}, journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova}, pages = {3--4}, publisher = {mathdoc}, volume = {152}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TM_1980_152_a0/} }
S. S. Ryshkov. Editor's preface. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Geometry of positive quadratic forms, Tome 152 (1980), pp. 3-4. http://geodesic.mathdoc.fr/item/TM_1980_152_a0/