https://www.mitpressjournals.org/doi/pdf/10.1162/089976601750264965 (Publisher version)
Schölkopf, B., Platt, J., Shawe-Taylor, J., Smola, A., & Williamson, R. (2001). Estimating the support of a high-dimensional distribution. Neural computation, 13(7), 1443-1471. doi:10.1162/089976601750264965.