@ARTICLE\{IMM2006-04694,
    author       = "V. Mak and T. Thomadsen",
    title        = "Polyhedral combinatorics of the cardinality constrained quadratic knapsack problem and the quadratic selective travelling salesman problem",
    year         = "2006",
    month        = "jun",
    pages        = "421-434",
    journal      = "Journal of Combinatorial Optimization",
    volume       = "11",
    editor       = "",
    number       = "4",
    publisher    = "Springer",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/4694-full.html",
    isbn_issn    = "1382-6905"
}