%0 Journal Article %A Boris M. Schein %T Products OF IDEMPOTENT ORDER-PRESERVING TRANSFORMATIONS OF ARBITRARY CHAINS. %J Semigroup forum %D 1975 %P 297-309 %V 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1975__11_134145/ %G en %F SF_1975__11_134145