Karplus, Vakerie Jean and Sergey Paltsev. Transportation Research Record Vol. 2287, (2012): 132-139.
Karplus, Valerie Jean. Massachusetts Institute of Technology, 2011.
Karplus, Valerie Jean, Sergey Paltsev and John M. Reilly. Transportation Research Part A Vol. 44, No. 8 (2010): 620-641.
Sandoval, Reynaldo, Valerie Jean Karplus, Sebastian Paltsev and John M. Reilly. Journal of Transport Economics and Policy Vol. 43, No. 3 (2009): 291-316.
Heywood, John B. and Valerie Jean Karplus. The Boston Globe, August 2009.
Chen, Haodong, Valerie J. Karplus, Hong Ma, and Xing Wang Deng. The Plant Cell Vol. 18, No. 11 (2006): 2855-2864.