Roumen Anguelov Svetoslav Markov Blagovest Sendov On the Normed Linear Space of Hausdorff Continuous Functions. 281-288 2005 conf/lssc/2005 LSSC http://dx.doi.org/10.1007/11666806_31 db/conf/lssc/lssc2005.html#AnguelovMS05