@article{MZ_1975__145_172268,
     author = {Karl Strambach},
     title = {Regul\"are idempotente {Multiplikationen.}},
     journal = {Mathematische Zeitschrift},
     pages = {43--62},
     publisher = {mathdoc},
     volume = {145},
     year = {1975},
     zbl = {0322.57008},
     url = {http://geodesic.mathdoc.fr/item/MZ_1975__145_172268/}
}