Singh, Rupinder Pal, and Hardeep Singh. “Defining the Logical Boundary of a Service: An Improved Model and Novel Metrics for Service-Oriented Systems”. INFOCOMP Journal of Computer Science 19, no. 2 (December 1, 2020): 10-22. Accessed April 11, 2021. http://infocomp.dcc.ufla.br/index.php/infocomp/article/view/964.