@article{SF_1974__9_134077,
     author = {K.A. Zareckii},
     title = {Maximal submonoids of the semigroup of binary relations.},
     journal = {Semigroup forum},
     pages = {196--208},
     publisher = {mathdoc},
     volume = {9},
     year = {1974},
     zbl = {0307.20035},
     url = {http://geodesic.mathdoc.fr/item/SF_1974__9_134077/}
}