@article{Khoshyaran_2021, title={The Causal Theory of Action based utility and consumer surplus}, volume={18}, url={http://scitecresearch.com/journals/index.php/jprm/article/view/2098}, number={4}, journal={Journal of Progressive Research in Mathematics}, author={Khoshyaran, M.M.}, year={2021}, month={Nov.}, pages={36-57}