Pitol DL, Issa JP, Caetano FH, Lunardi LO. Mononuclear phagocytes in the blood of turtles characterized by ultrastructural and cytochemical analyses and by phagocytic activity. Micron. 2008 Dec;39(8):1288–92. doi: 10.1016/j.micron.2008.03.003. PMID: 18448345.