@article{SF_1972__4_133909,
     author = {M.P. Dorofeeva},
     title = {Hereditary and semi-hereditary monoids.},
     journal = {Semigroup forum},
     pages = {301--311},
     year = {1972},
     volume = {4},
     zbl = {0259.20059},
     url = {http://geodesic.mathdoc.fr/item/SF_1972__4_133909/}
}