Shin, Yong Hyun, Jung Lim Koo, and Kum Hwan Roh. 2018. “An Optimal Consumption and Investment Problem With Quadratic Utility and Subsistence Consumption Constraints: A Dynamic Programming Approach”. Mathematical Modelling and Analysis 23 (4), 627-38. https://doi.org/10.3846/mma.2018.038.