1. Abbas AK, Lichtman AH (2003) Cellular and molecular immunology. Saunders, Philadelphia, pp 313–314
2. Alder A, Huber E (1923) Untersuchungen über blutzellen und zellbildung bei amphibien und reptilien. Folia Haemat 29:1–22
3. Barret WC (1934) Hemopoiesis in the bone marrow of plethodontid salamanders. Anat Rec 58:49–50
4. Barret WC (1936) A comparative survey of hemopoietic loci in urodele Amphibia, with special reference to the bone marrow of the Plethodontidae. Folia Hematol 54:165–192
5. Barret WC (1947) Hematopoiesis in the European plethodontid Hydromantes italicus, with reference to phylogeny. Anat Rec 98:127–136