Lawson topology of the space of formal balls and the hyperbolic topology.

Hideki Tsuiki Yasunao Hattori Lawson topology of the space of formal balls and the hyperbolic topology. 198-205 2008 405 Theor. Comput. Sci. 1-2 http://dx.doi.org/10.1016/j.tcs.2008.06.034 db/journals/tcs/tcs405.html#TsuikiH08