@article{10_21136_CPM_1970_108337,
     author = {Ibrahim, E. M.},
     title = {The inner product of $S$-functions},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {360--366},
     publisher = {mathdoc},
     volume = {095},
     number = {4},
     year = {1970},
     doi = {10.21136/CPM.1970.108337},
     mrnumber = {0281809},
     zbl = {0213.03603},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1970.108337/}
}