Velleda Caldas, Nádia, and Flávio Sacco dos Anjos. “FAMILY FARMING AND SOCIAL SECURITY: GROWING OLD IN POVERTY?”. Science & Technology Journals, vol. 24, no. 1/3, Jan. 2007, pp. 131-58, https://doi.org/10.35977/0104-1096.cct2007.v24.8643.