by Geiger, T, Bachman, S, Mayfield, T, Kroeker, T, Mascarenhas, C, Madsen, R, Rippey, P, de la Torre, R, Scott, S
Published in Annals of emergency medicine (2007)

by Leibowitz, M.R., Rippey, J.J. & Thompson, P.
Published in South African medical journal (01.01.1982)