The following eight publications describe the development of methods suitable for unsupervised learning of nonlinear factor analysis models.

**I**- H. Lappalainen
^{}, ``Using an MDL-based cost function with neural networks,'' in*Proceedings of the International Joint Conference on Neural Networks, IJCNN'98*, (Anchorage, Alaska, USA, May 4-9), pp. 2384-2389, 1998. **II**- H. Lappalainen,
``Ensemble Learning for Independent Component Analysis,''
in
*Proceedings of the First International Workshop on Independent Component Analysis and Blind Signal Separation, ICA'99*, (Aussois, France, Jan. 11-15), pp. 7-12, 1999. **III**- H. Lappalainen and X. Giannakopoulos,
``Multi-Layer Perceptrons as Nonlinear Generative Models for
Unsupervised Learning: a Bayesian Treatment,''
in
*Proceedings of the Ninth International Conference on Artificial Neural Networks, ICANN'99*, (Edinburgh, UK, Sep. 7-10), pp. 19-24, 1999. **IV**- H. Lappalainen and J. W. Miskin,
``Ensemble Learning,''
in
*Advances in Independent Component Analysis*(M. Girolami, ed.), pp. 76-92, Springer-Verlag, 2000. **V**- H. Lappalainen and A. Honkela,
``Bayesian Nonlinear Independent Component Analysis by Multi-Layer
Perceptrons,''
in
*Advances in Independent Component Analysis*(M. Girolami, ed.), pp. 93-121, Springer-Verlag, 2000. **VI**- H. Valpola,
``Nonlinear Independent Component Analysis Using Ensemble Learning:
Theory,''
in
*Proceedings of the Second International Workshop on Independent Component Analysis and Blind Signal Separation, ICA 2000*, (Helsinki, Finland, June 19-22), pp. 251-256, 2000. **VII**- H. Valpola and P. Pajunen,
``Fast Algorithms for Bayesian Independent Component Analysis,''
in
*Proceedings of the Second International Workshop on Independent Component Analysis and Blind Signal Separation, ICA 2000*, (Helsinki, Finland, June 19-22), pp. 233-237, 2000. **VIII**- H. Valpola, ``Unsupervised learning of nonlinear dynamic state-space models,'' Publications in Computer and Information Science A59, Helsinki University of Technology, Espoo, Finland, 2000.