@article{VMUMM_2011_5_a1,
     author = {V. V. Yedynak},
     title = {Order separability of free products with amalgamated subgroup},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {6--14},
     publisher = {mathdoc},
     number = {5},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2011_5_a1/}
}