@article{PORMA_1972__31_2_115165,
     author = {Artiaga, Lucio and Takahashi, Shuichi},
     title = {Reciprocities on groups},
     journal = {Portugaliae mathematica},
     pages = {85--95},
     publisher = {mathdoc},
     volume = {31},
     number = {2},
     year = {1972},
     mrnumber = {0303215},
     zbl = {0237.43001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1972__31_2_115165/}
}