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@article{PIM_1975_N_S_19_33_a19, author = {Slavi\v{s}a B. Pre\v{s}i\'c}, title = {Equational {Reformulation} {Of} {Formal} {Theories}}, journal = {Publications de l'Institut Math\'ematique}, pages = {131 }, publisher = {mathdoc}, volume = {_N_S_19}, number = {33}, year = {1975}, url = {http://geodesic.mathdoc.fr/item/PIM_1975_N_S_19_33_a19/} }
Slaviša B. Prešić. Equational Reformulation Of Formal Theories. Publications de l'Institut Mathématique, _N_S_19 (1975) no. 33, p. 131 . http://geodesic.mathdoc.fr/item/PIM_1975_N_S_19_33_a19/