1. Optimisation and approximation in deterministic sequencing and scheduling;Graham;Annals of Discrete Mathematics,1979
2. Complexity of machine scheduling problems;Lenstra;Annals of Discrete Mathematics,1977
3. Preemptive scheduling of uniform machines subject to release dates;Labetoulle,1984
4. Various optimizers for single-stage production;Smith;Naval Research Logistics Quarterly,1956
5. Rinaldi G, Sassano A. On a job scheduling problem with different ready times: some properties and a new algorithm to determine the optimal solution. Report R.77-24, Istituto di Automatica, Università di Roma, Italy; 1977.