Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{AM2_1969__2_182302, author = {H. SCHWERDTFEGER}, title = {Involutory {Functions} and {Even} {Functions}}, journal = {Aequationes mathematicae}, pages = {50--61}, publisher = {mathdoc}, volume = {2}, year = {1969}, zbl = {0176.46104}, url = {http://geodesic.mathdoc.fr/item/AM2_1969__2_182302/} }
H. SCHWERDTFEGER. Involutory Functions and Even Functions. Aequationes mathematicae, Tome 2 (1969), pp. 50-61. http://geodesic.mathdoc.fr/item/AM2_1969__2_182302/