@article{10_4064_ap_48_2_183_189,
     author = {L\'aszl\'o Sz\'ekelyhidi},
     title = {Fr\'echet's equation and {Hyers} theorem on noncommutative semigroups},
     journal = {Annales Polonici Mathematici},
     pages = {183--189},
     publisher = {mathdoc},
     volume = {48},
     number = {2},
     year = {1988},
     doi = {10.4064/ap-48-2-183-189},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-48-2-183-189/}
}