@article{ADM_2021_32_1_a9,
     author = {Yu. V. Zhuchok},
     title = {Free abelian trioids},
     journal = {Algebra and discrete mathematics},
     pages = {147--160},
     year = {2021},
     volume = {32},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2021_32_1_a9/}
}