Tenenbaum, G.; Yokota, H. (1990), "Length and denominators of Egyptian fractions", Journal of Number Theory 35: 150--156, doi:10.1016/0022-314X(90)90109-5, MR1057319.
Tenenbaum, G.; Yokota, H. (1990), "Length and denominators of Egyptian fractions", Journal of Number Theory 35: 150--156, doi:10.1016/0022-314X(90)90109-5, MR1057319.