- Arey, L.B. (1957). Developmental Anatomy. 6th ed. W.B. Saunders Company, Philadelphia. pp.676.
- Chrisman, C.L. (1991). Problems in Small Animal Neurology. 2nd ed. Lea and Febiger, Philadelphia. pp.526.
- De Lahunta, A. (1983). Veterinary Neuroanatomy and Clinical Neurology. 2nd ed. W.B. Saunders Company,
- Philadelphia. pp. 8-317.
- Dellmann, H.D. and Eurell, J.A. (1998). Textbook of Veterinary Histology. 5th ed. Williams and Wilkins, Lippincott Philadelphia. pp. 91-113.
- Ghosh, R.K. (2002). Essentials of Veterinary Embryology. Medical Book Company, Kolkatta. pp: 86-89.
- Gilbert, S.F. (1997). Developmental Biology. 5th ed. Sinauer Associates, Sunderland. pp.473.
- Harrison, R.G. (1978). Clinical Embryology. Academic Press, London. pp. 250.
- Houston, M.L. (1968). J. comp. Neurol. 134: 371.
- Jacobson, A.G. and Tam, P.P.L. (1982). Anat. Rec. 203: 375.
- Jenkins, T.W. (1978). Functional Mammalian Neuroanatomy. 2nd ed. Lea and Febiger, Philadelphia. pp. 480. Vol. 43, No. 1, 2009 11
- Keith, A. (1947). Human Embryology and Morphology. 6th ed. Williams and Wilkins, Baltimore. pp. 690.
- Luna, L.G. (1968). Manual of Histological Staining Methods of the Armed Forces Institute of Pathology. 3rd ed. Mc Graw-Hill Book Company, New York. pp.258.
- Mc Ewen, R.S. (1957). Vertebrate Embryology. 4th ed. Henry Holt and Company, New York. pp.701.
- Sadler, T.W. (2004). Langman’s Medical Embryology. 9th ed. Lippincott Williams and Wilkins, Philadelphia. pp. 433-474.
- Singh, Y. et al. (1979). Indian J. Anim. Sci., 49 : 925-931.
- Snedecor, G.W. and Cochran, W.G. (1985). Statistical Methods. 7th ed. The Iowa State University Press, USA. pp. 313