Irene Weber Birgit Tausend Irene Stahl Language Series Revisited: The Complexity of Hypothesis Spaces in ILP (Extended Abstract). 360-363 1995 conf/ecml/1995 ECML db/conf/ecml/ecml95.html#WeberTS95 http://dx.doi.org/10.1007/3-540-59286-5_87