↑ Lawrence J. Hubert (1987). Assignment Methods in Combinatorial Data Analysis . Marcel Dekker. ISBN978-0824776176。
↑ Lawrence J. Hubert; Phipps Arabie; Jacqueline Meulman (2001). Combinatorial Data Analysis: Optimization by Dynamic Programming . SIAM. ISBN978-0898714784。
↑ Michael J Brusco; Stephanie Stahl (2005). Branch-and-bound Applications in Combinatorial Data Analysis . Springer. ISBN978-0387250373。