LI, Fengsen. Retracted: how to solve the moral dilemma of helping a fallen old man: an economic point of view. Business, Management and Economics Engineering, [S. l.], v. 11, n. 2, p. 209–223, 2013. DOI: 10.3846/bme.2013.12. Disponível em: https://journals.vilniustech.lt/index.php/BMEE/article/view/3652. Acesso em: 9 may. 2025.