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Santos, Fred Luciano Neves; Cerqueira, Elúzio José Lima; Soares, Neci Matos (March 2005). "Comparison of the thick smear and Kato-Katz techniques for diagnosis of intestinal helminth infections". Revista Da Sociedade Brasileira De Medicina Tropical. 38 (2): 196–198. doi:10.1590/S0037-86822005000200016. ISSN0037-8682. PMID15821801.
Katz, N.; Chaves, A.; Pellegrino, J. (November 1972). "A simple device for quantitative stool thick-smear technique in Schistosomiasis mansoni". Revista Do Instituto De Medicina Tropical De Sao Paulo. 14 (6): 397–400. ISSN0036-4665. PMID4675644.
Santos, Fred Luciano Neves; Cerqueira, Elúzio José Lima; Soares, Neci Matos (March 2005). "Comparison of the thick smear and Kato-Katz techniques for diagnosis of intestinal helminth infections". Revista Da Sociedade Brasileira De Medicina Tropical. 38 (2): 196–198. doi:10.1590/S0037-86822005000200016. ISSN0037-8682. PMID15821801.