Lavorante, Beatriz Regina Brito de Oliveira, et al. “Method for the Determination and Evaluation of Oxytetracycline Depletion in Marine Shrimp”. Pesquisa Agropecuaria Brasileira, vol. 44, no. 7, Nov. 2010, pp. 738-45, doi:10.1590/S1678-3921.pab2009.v44.2118.