Baraldi, W. A., D. Scarpa, I. Ponzoni, and J. R. Ardenghi. “Activation and Termination Detection on Distributed Systems”. Journal of Computer Science and Technology, vol. 4, no. 01, Apr. 2004, pp. p. 32-37, https://journal.info.unlp.edu.ar/JCST/article/view/911.