Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{ARM_1973__9_1_a4, author = {Karpe, Robert}, title = {Verallgemeinerung der goniometrischen {Funktionen}}, journal = {Archivum mathematicum}, pages = {26--48}, publisher = {mathdoc}, volume = {09}, number = {1}, year = {1973}, mrnumber = {0362007}, zbl = {0282.50004}, language = {ge}, url = {https://geodesic-test.mathdoc.fr/item/ARM_1973__9_1_a4/} }
Karpe, Robert. Verallgemeinerung der goniometrischen Funktionen. Archivum mathematicum, Tome 09 (1973) no. 1, pp. 26-48. https://geodesic-test.mathdoc.fr/item/ARM_1973__9_1_a4/