Chen, S., Cowan, C.F. and Grant, P.M. (1991) Orthogonal least squares learning algorithms for radial basis function networks. IEEE Transactions on Neural Networks, 2, 302-309. http://dx.doi.org/10.1109/72.80341
 Gomm, J.B. and Yu, D.L. (2000) Selecting radial basis function network centers with recursive orthogonal least squares training. IEEE Transactions on Neural Networks, 11, 306-314. http://dx.doi.org/10.1109/72.839002
 Wettschereck, D. and Dietterich, T. (1992) Improving the performance of radial basis function networks by learning center locations. Moody, J., Hanson, S. and Lippman R., Eds., Advances in Neural Information Processing Systems 4, Morgan Kaufmann Publishers, San Mateo.
 Tarassenko, L. and Roberts, S. (1994) Supervised and unsupervised learning in radial basis function classifiers. IEE Proceedings of Vision, Image and Signal Processing, 141, 210-216. http://dx.doi.org/10.1049/ip-vis:19941324