https://link.springer.com/content/pdf/10.1007%2Fs10994-006-6895-9.pdf (Publisher version)
Blanchard, G., Bousquet, O., & Zwald, L. (2006). Statistical Properties of Kernel Principal Component Analysis. Machine Learning, 66(2-3), 259-294. doi:10.1007/s10994-006-6895-9.