@article{
    Kohonen97,
    author = "Kohonen, Teuvo and Kaski, Samuel and Lappalainen, Harri",
    title = "Self-Organized Formation of Various Invariant-Feature Filters in the Adaptive-Subspace {SOM}",
    journal = "Neural Computation",
    volume = "9",
    flags = "public",
    year = "1997",
    pages = "1321-1344"
}