et. al., SangethaSangani,. “A Survey of QoS Aware and Fault Tolerant Workflow Execution in Heterogeneous Cloud Environment”. Turkish Journal of Computer and Mathematics Education (TURCOMAT), vol. 12, no. 9, Apr. 2021, pp. 2586– 2598, https://turcomat.org/index.php/turkbilmat/article/view/3747.