https://academic.oup.com/bioinformatics/article/21/suppl_1/i47/202991 (Publisher version)
Borgwardt, K., Ong, C., Schönauer, S., Vishwanathan, S., Smola, A., & Kriegel, H.-P. (2005). Protein function prediction via graph kernels. Bioinformatics, 21(Supplement 1), i47-i56. doi:10.1093/bioinformatics/bti1007.