@article{
    Kangas90a,
    author = "Kangas, Jari and Kohonen, Teuvo and Laaksonen, Jorma",
    title = "Variants of {S}elf-{O}rganizing {M}aps",
    journal = "IEEE Transactions on Neural Networks",
    number = "1",
    volume = "1",
    year = "1990",
    dbinsdate = "oldtimer",
    pages = "93--99"
}