@article{AM2_1977__15_136640, author = {Steven B. Bank and Robert P. Kaufman}, title = {On the {Weierstrass} functions, {Sigma,} {Zeta,} {Pe,} and their functional and differential equations. {(Short} {Communication).}}, journal = {Aequationes mathematicae}, pages = {115--117}, publisher = {mathdoc}, volume = {15}, year = {1977}, zbl = {0378.33005}, url = {http://geodesic.mathdoc.fr/item/AM2_1977__15_136640/} }