An optimal investment, consumption, leisure, and voluntary retirement problem with Cobb-Douglas utility: Dynamic programming approaches. - Jung Lim Koo; Byung Lim Koo; Yong Hyun Shin (Appl. Math. Lett., 2013)

An Optimal Consumption and Investment Problem with quadratic Utility and subsistence Consumption Constraints: a Dynamic Programming Approach. - Yong Hyun Shin; Jung Lim Koo; Kum-Hwan Roh (Math. Model. Anal., 2018)