Nguyen, T. T., D. N. Vo, T. Deveikis, and A. Rozanskiene. “Improved Cuckoo Search Algorithm for Nonconvex Hydrothermal Scheduling With Volume Constraint”. Elektronika Ir Elektrotechnika, vol. 23, no. 3, July 2017, pp. 68-73, doi:10.5755/j01.eie.23.3.12657.