@article{10_4153_S0008439519000389,
     author = {Dicks, Warren and \v{S}uni\'c, Zoran},
     title = {Orders on {Trees} and {Free} {Products} of {Left-ordered} {Groups}},
     journal = {Canadian mathematical bulletin},
     pages = {335--347},
     year = {2020},
     volume = {63},
     number = {2},
     doi = {10.4153/S0008439519000389},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008439519000389/}
}