Marques, M., Ianni, Á., Mendes, A., & Mantovani, R. (1969). The importance of the historical perspective for social thinking in health: the contributions of Madel Luz and Emerson Merhy. Historia, Ciencias, Saude--Manguinhos, 25(2), 353-369. https://doi.org/10.1590/S0104-59702018000200004 (Original work published 1969)