Kozo Ichida Takeshi Kiyono Fujiichi Yoshimoto Curve Fitting by a One-Pass Method With a Piecewise Cubic Polynomial. 164-174 1977 3 ACM Trans. Math. Softw. 2 http://doi.acm.org/10.1145/355732.355737 db/journals/toms/toms3.html#IchidaKY77