https://dl.acm.org/citation.cfm?doid=1390156.1390219 (Publisher version)
Kondor, R., & Borgwardt, K. (2008). The skew spectrum of graphs. In W. Cohen, A. McCallum, & S. Roweis (Eds.), ICML '08: Proceedings of the 25th international conference on Machine (pp. 496-503). New York, NY, USA: ACM Press.