@article{TAC_2017_32_a31,
     author = {Shengwei Han and Changchun Xia and Xiaojuan Gu},
     title = {Free objects over posemigroups in the category {PoSgr_v}},
     journal = {Theory and applications of categories},
     pages = {1098--1106},
     publisher = {mathdoc},
     volume = {32},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2017_32_a31/}
}