@article{106264, author = {Pavel Pudl\'ak}, title = {A definition of exponentiation by a bounded arithmetical formula}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {024}, year = {1983}, pages = {667-671}, zbl = {0533.03032}, mrnumber = {738562}, language = {en}, url = {http://dml.mathdoc.fr/item/106264} }
Pudlák, Pavel. A definition of exponentiation by a bounded arithmetical formula. Commentationes Mathematicae Universitatis Carolinae, Tome 024 (1983) pp. 667-671. http://gdmltest.u-ga.fr/item/106264/
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