... Bouchard RE, Tufo HM, Van Buren HC, Eddy WM, Twitchell JC, Bedard L, et al. The patient and his
problem-oriented record. In: In Walker HK, Hurst JW, Moody MF (eds): Applying the problem-oriented system. New York: Medcom...
http://www.jmir.org/2004/2/e12/