Dixon JD (1970). The Number of Steps in the Euclidean Algorithm. J. Number Theory. 2: 414—422. doi:10.1016/0022-314X(70)90044-2.
Norton GH (1990). On the Asymptotic Analysis of the Euclidean Algorithm. Journal of Symbolic Computation. 10: 53—58. doi:10.1016/S0747-7171(08)80036-3.
Stewart BM (1964). Theory of Numbers (вид. 2nd). New York: Macmillan. с. 43—44. LCCN64-10964.
Heilbronn HA (1969). On the Average Length of a Class of Finite Continued Fractions. У Paul Turán (ред.). Number Theory and Analysis. New York: Plenum. с. 87—96. LCCN68-8991.