@article{10_4153_CJM_1969_106_x,
     author = {Roggenkamp, Klaus W.},
     title = {On the {Irreducible} {Lattices} of {Orders}},
     journal = {Canadian journal of mathematics},
     pages = {970--976},
     year = {1969},
     volume = {21},
     number = {1},
     doi = {10.4153/CJM-1969-106-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1969-106-x/}
}