@techreport{
    Kohonen96a31,
    author = "Kohonen, Teuvo and Hynninen, Jussi and Kangas, Jari and Laaksonen, Jorma",
    title = "{SOM\_PAK}: {T}he {S}elf-{O}rganizing {M}ap Program Package",
    number = "A31",
    month = "January",
    year = "1996",
    type = "Report",
    institution = "Helsinki University of Technology, Laboratory of Computer and Information Science"
}