1. Optimal management of irrigation canal networks with self-levelling gates;Corriga,1982
2. Machine Scheduling Problems;Rinnooy Kan,1976
3. Introduction to Sequencing and Scheduling;Baker,1974
4. Computers and Intractability: A Guide to the Theory of NP-Completeness;Garey,1979
5. An Introduction to the Theory of Numbers;Hardy,1979