@article{102438, author = {Ji\v r\'\i\ Rach\r unek}, title = {Convex directed subgroups of right ordered tree groups}, journal = {Czechoslovak Mathematical Journal}, volume = {41}, year = {1991}, pages = {99-103}, zbl = {0803.06020}, mrnumber = {1087628}, language = {en}, url = {http://dml.mathdoc.fr/item/102438} }
Rachůnek, Jiří. Convex directed subgroups of right ordered tree groups. Czechoslovak Mathematical Journal, Tome 41 (1991) pp. 99-103. http://gdmltest.u-ga.fr/item/102438/
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