@article{SF_1975__11_134145,
     author = {Boris M. Schein},
     title = {Products {OF} {IDEMPOTENT} {ORDER-PRESERVING} {TRANSFORMATIONS} {OF} {ARBITRARY} {CHAINS.}},
     journal = {Semigroup forum},
     pages = {297--309},
     publisher = {mathdoc},
     volume = {11},
     year = {1975},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SF_1975__11_134145/}
}