by Yue, Yong-Jie, Yu, Xin-Xiao, Li, Gang-Tie, Fan, Deng-Xing, Ye, Jun-Dao
Published in Ying yong sheng tai xue bao (01.08.2009)

by YE, Dao Jun, LAM, William H.K., TAM, Mei Lam
Published in Journal of the Eastern Asia Society for Transportation Studies (2011)