@article{MS2_1994__74_1_167279,
     author = {Dao-Rong Ton and Kai-Yao He},
     title = {Free {Archimedean} {l-Groups.}},
     journal = {Mathematica Scandinavica},
     pages = {34--48},
     publisher = {mathdoc},
     volume = {74},
     number = {1},
     year = {1994},
     zbl = {0819.06017},
     url = {http://geodesic.mathdoc.fr/item/MS2_1994__74_1_167279/}
}