Visualization and structure analysis of legislative acts : a case study on the law of obligationsLiiv, Innar; Vedešin, Anton; Täks, ErmoProceedings of the 11th International Conference on Artificial Intelligence and Law (ICAIL'07) : Standford University, June 4-8, 20072007 / p. 189-190 http://innar.com/p189-liiv.pdf