Pearce, Fred; Burns, Daniel R.; Rao, Rama V. N.; Willis, Mark E.; Byun, Joongmoo(Massachusetts Institute of Technology. Earth Resources Laboratory, 2003)
Minsley, Burke J.; Willis, Mark E.; Krasovec, Mary L.; Burns, Daniel R.; Toksoz, M. Nafi(Massachusetts Institute of Technology. Earth Resources Laboratory, 2004-05-26)