https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=914517 (Publisher version)
Müller, K.-R., Mika, S., Rätsch, G., Tsuda, K., & Schölkopf, B. (2001). An Introduction to Kernel-Based Learning Algorithms. IEEE Transactions on Neural Networks, 12(2), 181-201. doi:10.1109/72.914517.