Hao Cheng

Fang, S., Cheng, H., & Lavery, J. E. (2005). A Geometric Programming Framework for Univariate Cubic L 1 Smoothing Splines. Annals of Operations Research, 133(1-4), 229–248. https://doi.org/10.1007/s10479-004-5035-9

Cheng, H., Fang, S. C., & Lavery, J. E. (2005). Shape-preserving properties of univariate cubic L-1 splines. JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 174(2), 361–382. https://doi.org/10.1016/j.cam.2004.05.003

Cheng, H., Fang, S. C., & Lavery, J. E. (2004). An efficient algorithm for generating univariate cubic L-1 splines. COMPUTATIONAL OPTIMIZATION AND APPLICATIONS, 29(2), 219–253. https://doi.org/10.1023/B:COAP.0000042031.03626.1b

Cheng, H., Fang, S. C., & Lavery, J. E. (2002). Univariate cubic L-1 splines - A geometric programming approach. MATHEMATICAL METHODS OF OPERATIONS RESEARCH, 56(2), 197–229. https://doi.org/10.1007/s001860200216