Murray (1986), p. 188 Murray, Oswyn (1986). "Greek historians". In Boardman, John; Griffin, Jasper; Murray, Oswyn (eds.). The Oxford History of the Classical World. Oxford, UK: Oxford University Press. pp. 186–203. ISBN978-0-19-872112-3.
Murray (1986), pp. 190–191 Murray, Oswyn (1986). "Greek historians". In Boardman, John; Griffin, Jasper; Murray, Oswyn (eds.). The Oxford History of the Classical World. Oxford, UK: Oxford University Press. pp. 186–203. ISBN978-0-19-872112-3.
Murray (1986), p. 189 Murray, Oswyn (1986). "Greek historians". In Boardman, John; Griffin, Jasper; Murray, Oswyn (eds.). The Oxford History of the Classical World. Oxford, UK: Oxford University Press. pp. 186–203. ISBN978-0-19-872112-3.
Macfarland, Craig G.; Reeder, W. G. (1974). "Cleaning symbiosis involving Galapagos tortoises and two species of Darwin's finches". Zeitschrift für Tierpsychologie. 34 (5): 464–483. doi:10.1111/j.1439-0310.1974.tb01816.x. PMID4454774.
Macfarland, Craig G.; Reeder, W. G. (1974). "Cleaning symbiosis involving Galapagos tortoises and two species of Darwin's finches". Zeitschrift für Tierpsychologie. 34 (5): 464–483. doi:10.1111/j.1439-0310.1974.tb01816.x. PMID4454774.