RITESHWARI CHATURVEDI, V. K. P. K. M. S. S. Profit Analysis of a System Having One Main Unit And Two Supporting Units. International Journal of Engineering and Computer Science, india, v. 2, n. 10, 2013. Disponível em: http://ijecs.in/index.php/ijecs/article/view/2114. Acesso em: 23 dec. 2024.