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@article{MZM_1984_36_4_a10, author = {V. I. Mart'yanov}, title = {Invariant transformations of formulas}, journal = {Matemati\v{c}eskie zametki}, pages = {571--582}, publisher = {mathdoc}, volume = {36}, number = {4}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1984_36_4_a10/} }
V. I. Mart'yanov. Invariant transformations of formulas. Matematičeskie zametki, Tome 36 (1984) no. 4, pp. 571-582. http://geodesic.mathdoc.fr/item/MZM_1984_36_4_a10/