Number of Crossing-Free Geometric Graphs vs. Triangulations. - Andreas Razen; Jack Snoeyink; Emo Welzl (Electron. Notes Discret. Math., 2008)

Transforming spanning trees: A lower bound. - Kevin Buchin; Andreas Razen; Takeaki Uno; Uli Wagner 001 (Comput. Geom., 2009)

Counting Plane Graphs with Exponential Speed-Up. - Andreas Razen; Emo Welzl (Rainbow of Computer Science, 2011)

On the number of crossing-free partitions. - Andreas Razen; Emo Welzl (Comput. Geom., 2013)