MinJeong Kim, Richard D. Braatz, Jeong Tai Kim, ChangKyoo Yoo^*, Economical Control of Indoor Air Quality in Underground Metro Station Using an Iterative Dynamic Programming Based Ventilation System, Indoor and Built Environment(ISSN: 1420-326X, SCIE), SAGE journal, 25(6), pp.949-961 (2016.09) (Ack: NRF grant- MSIP- 2015R1A2A2A11001120)