Tamošaitis, Romualdas, and Leonarda Gargasaite. “Simulation of Virtual Time Norms for Technological Processes”. Journal of Business Economics and Management 4, no. 4 (December 31, 2003): 235-240. Accessed November 1, 2024. https://jcem.vgtu.lt/index.php/JBEM/article/view/8301.