@article{DMGAA_2004_24_2_a4,
     author = {\v{C}ern\'ak, \v{S}tefan},
     title = {Convergence with a regulator in directed groups},
     journal = {Discussiones Mathematicae. General Algebra and Applications},
     pages = {211--223},
     publisher = {mathdoc},
     volume = {24},
     number = {2},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGAA_2004_24_2_a4/}
}