@article{COMIM_2000_8_1_a8,
     author = {\v{S}marda, Bohumil},
     title = {Inner product in $l$-groups},
     journal = {Communications in Mathematics},
     pages = {89--95},
     year = {2000},
     volume = {8},
     number = {1},
     mrnumber = {1800225},
     zbl = {1021.06008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/COMIM_2000_8_1_a8/}
}