Robert J. Master, Marie Feltin, John Jainchill, Roger Mark, William N. Kavesh, Mitchell T. Rabkin, Barbara Turner, Sarah Bachrach, Sara Lennox,
A Continuum of Care for the Inner City New England Journal of Medicine. ,vol. 302, pp. 1434- 1440 ,(1980) ,
10.1056/NEJM198006263022602