@article {IOPORT.03930346,
    author       = {Vysko\v{c}, Jozef},
    title        = {Estimating the permanent.},
    year         = {1985},
    journal      = {Computers and Artificial Intelligence},
    volume       = {4},
    issn         = {0232-0274},
    pages        = {445-449},
    publisher    = {Slovak Academic Press Ltd., Bratislava},
    abstract     = {Some polynomial-time algorithms for computing lower bounds of the permanent of a nonnegative integer matrix are presented. It is also shown that testing whether per A$=0$ or per A$=1$ can be accomplished in polynomial time.},
    identifier   = {03930346},
}