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@article{10_4064_ap_20_3_245_249, author = {Pl. Kannappan}, title = {On cosine and sine functional equations}, journal = {Annales Polonici Mathematici}, pages = {245--249}, publisher = {mathdoc}, volume = {20}, number = {3}, year = {1968}, doi = {10.4064/ap-20-3-245-249}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-20-3-245-249/} }
TY - JOUR AU - Pl. Kannappan TI - On cosine and sine functional equations JO - Annales Polonici Mathematici PY - 1968 SP - 245 EP - 249 VL - 20 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ap-20-3-245-249/ DO - 10.4064/ap-20-3-245-249 LA - en ID - 10_4064_ap_20_3_245_249 ER -
Pl. Kannappan. On cosine and sine functional equations. Annales Polonici Mathematici, Tome 20 (1968) no. 3, pp. 245-249. doi : 10.4064/ap-20-3-245-249. http://geodesic.mathdoc.fr/articles/10.4064/ap-20-3-245-249/
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