*Young B, Heath, JW: ''Wheater's Functional Histology: A Text and Colour Atlas'', 4th ed, pp. 249-274. Churchill Livingstone, London, England, 2000. | *Young B, Heath, JW: ''Wheater's Functional Histology: A Text and Colour Atlas'', 4th ed, pp. 249-274. Churchill Livingstone, London, England, 2000. |