1. Functions which satisfy Abel's differential equation;Vein;SIAM J. Appl. Math.,1967
2. A bibliographical note on higher order sine functions;Kaufman;Scripta Math.,1967
3. Propositions d'alge`bre et de ge´ome´trie de´duites de la conside´ration des racines cubiques de l'unite´;Appell;C. R. Acad. Sci. Paris,1877
4. Sur certaines fonctions analogues aux fonctions circulaires;Appell;C. R. Acad. Sci. Paris,1877
5. On a special form of determinant and on certain functions of n variables analogous to the sine and cosine;Glaisher;Quart. J. Pure Appl. Math.,1879