B. R. Cavalcante, A. Shimoya, and K. da C. Ribeiro, “Validation of a questionnaire on the level of satisfaction in a bakery in Campos dos Goytacazes, Brazil”, Revista Vértices, vol. 19, no. 3, pp. 187–209, Dec. 2017, doi: 10.19180/1809-2667.v19n32017p187-209.