The quadratic assignment problem with a monotone anti-Monge and a symmetric Toeplitz matrix: Easy and hard cases.

Rainer E. Burkard Eranda Çela Günter Rote Gerhard J. Woeginger The quadratic assignment problem with a monotone anti-Monge and a symmetric Toeplitz matrix: Easy and hard cases. 125-158 1998 82 Math. Program. db/journals/mp/mp82.html#BurkardCRW98