@article{MM2_1976__19_154414,
     author = {H. R\"ohrl and M.B. Wischnewsky},
     title = {Subalgebras that are {Cyclic} as {Submodules.}},
     journal = {Manuscripta mathematica},
     pages = {195--210},
     publisher = {mathdoc},
     volume = {19},
     year = {1976},
     zbl = {0333.17002},
     url = {http://geodesic.mathdoc.fr/item/MM2_1976__19_154414/}
}