1.Willett, W (2012) Nutritional Epidemiology, 3rd ed.Oxford: Oxford University Press.
2.Subar, AF, Crafts, J, Zimmerman, TP, et al. (2010) Assessment of the accuracy of portion size reports using computer-based food photographs aids in the development of an automated self-administered 24-hour recall. J Am Diet Assoc 110, 55–64.
3.Slimani, N, Casagrande, C, Nicolas, G, et al. (2011) The standardized computerized 24-h dietary recall method EPIC-Soft adapted for pan-European dietary monitoring. Eur J Clin Nutr 65, Suppl. 1, S5–S15.
4.Carter, MC, Albar, SA, Morris, MA, et al. (2015) Development of a UK online 24-h dietary assessment tool: myfood24. Nutrients 7, 4016–4032.
5.Bartrina, JA, Rodrigo, CP, Aresti, GA, et al. (2015) Controversies about population, clinical or basic research studies related with food, nutrition, physical activity and lifestyle. Nutr Hosp 31, Suppl. 3, 15–21.
6.Bel-Serrat, S, Knaze, V, Nicolas, G, et al. (2017) Adapting the standardised computer- and interview-based 24 h dietary recall method (GloboDiet) for dietary monitoring in Latin America. Public Health Nutr 20, 2847–2858.
7.Crispim, SP, Fisberg, RM, Almeida, CCB, et al. (2017) Manual Fotográfico de Quantificação Alimentar (Photographic Manual of Food Quantification), 1st ed.Curitiba, Paraná: Universidade Federal do Paraná.
8.Nichelle, PG, Almeida, CCB, Camey, SA, et al. (2019) Subjects' perception in quantifying printed and digital photos of food portions. Nutrients 11, E501.
9.Freire, P (2018) Pedagogy of the Oppressed, 30th ed.New York: Bloomsbury Publishing.
10.Gibson, R & Ferguson, E (2008) An Interactive 24-hour Recall for Assessing the Adequacy of Iron and Zinc Intakes in Developing Countries. HarvestPlus Technical Monograph 8. Washington, DC: International Food Policy Research Institute.
11.Arens-Volland, AG, Spassova, L & Bohn, T (2015) Promising approaches of computer-supported dietary assessment and management – current research status and available applications. Int J Med Inform 84, 997–1008.
12.IBGE (Instituto Brasileiro de Geografia e Estatistica) (2018) Pesquisa Nacional por Amostra de Domicílios Contínua 2017–2018 (Continuous National Household Sample Survey 2017–2018). Washington, DC: IBGE.
13.Flick, U (2018) An Introduction to Qualitative Research, 6th ed.London: Sage Publications Limited.
14.Bardin, L (2001) L'analyse de contenu (Content Analysis), 10th ed., pp. 93–117. Paris: Presses Universitaires de France.
15.O. Nyumba, T, Wilson, K, Derrick, CJ, et al. (2018) The use of focus group discussion methodology: insights from two decades of application in conservation. Methods Ecol Evol 9, 20–32.
16.Schwarz, NE & Sudman, SE (1996) Answering Questions: Methodology for Determining Cognitive and Communicative Processes in Survey Research, 1st ed.San Francisco, CA: Jossey-Bass.
17.D'Espíndula, TS & França, BHS (2016) Ethical and bioethical aspects in the research interview: the impact on subjectivity. Rev Bioet 24, 495–502.
18.Szenczi-Cseh, J, Horvath, Z & Ambrus, A (2017) Validation of a food quantification picture book and portion sizes estimation applying perception and memory methods. Int J Food Sci Nutr 68, 960–972.
19.Garcia, RWD (2004) Representations on food intake and its implications in nutritional investigations: qualitative study with subjects submitted to dietary prescriptions. Rev Nutr 17, 15–28.
20.Canesqui, AM & Garcia, RWD (2005) Antropologia e Nutrição: um diálogo possível (Anthropology and Nutrition: A Possible Dialogue), 1st ed.Rio de Janeiro: Editora Fiocruz.
21.Ovaskainen, ML, Paturi, M, Reinivuo, H, et al. (2008) Accuracy in the estimation of food servings against the portions in food photographs. Eur J Clin Nutr 62, 674–681.