Ajith Abraham Hongbo Liu Mingyan Zhao Particle Swarm Scheduling for Work-Flow Applications in Distributed Computing Environments. 327-342 2008 Metaheuristics for Scheduling in Industrial and Manufacturing Applications http://dx.doi.org/10.1007/978-3-540-78985-7_13 series/sci/2008-128 db/series/sci/sci128.html#AbrahamLZ08