@article{ADM_2019_27_1_a12,
     author = {Yurii V. Zhuchok and J\"org Koppitz},
     title = {Representations of ordered doppelsemigroups by~binary relations},
     journal = {Algebra and discrete mathematics},
     pages = {144--154},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2019_27_1_a12/}
}