http://alex.smola.org/papers/1998/SmoSchMul98.pdf (Any fulltext)
Smola, A., Schölkopf, B., & Müller, K.-R. (1998). General cost functions for support vector regression. In T. Downs, M. Frean, & M. Gallagher (Eds.), Ninth Australian Conference on Neural Networks (ACNN 1998) (pp. 79-83). St. Lucia.