Purves, Dale; Augustine, George J.; Fitzpatrick, David; Hall, William C.; LaMantia, Anthony-Samuel; McNamara, James O.; White, Leonard E. (2008). Neuroscience (4a eld.). Sinauer Associates. pp. 11–20. ISBN 978-0-87893-697-7. Alirita la 22an de Septembro 2021.
Purves, Dale; Augustine, George J.; Fitzpatrick, David; Hall, William C.; LaMantia, Anthony-Samuel; McNamara, James O.; White, Leonard E. (2008). Neuroscience (4a eld.). Sinauer Associates. pp. 11–20. ISBN 978-0-87893-697-7.