SLACK WV, Porter D, Balkin P, Kowaloff HB, Slack CW.  1990.  Computer-assisted soliloquy as an approach to psychotherapy.. MD Comput. 7(1):37-42,58.

Safran C, Porter D, Lightfoot J, Rury CD, Underhill LH, Bleich HL, SLACK WV.  1989.  ClinQuery: a system for online searching of data in a teaching hospital.. Ann Intern Med. 111(9):751-6.

Porter D, Wigton RS, Reidelbach MA, Bleich HL, SLACK WV.  1988.  Self-service computerized bibliographic retrieval: a comparison of Colleague and PaperChase, programs that search the MEDLINE data base.. Comput Biomed Res. 21(5):488-501.

Ryan P, Winand D, Bleich HL, SLACK WV, Porter D.  1987.  Computer searching of the medical literature.. Ann Intern Med. 106(1):168-9.

Safran C, Porter D, SLACK WV, Bleich HL.  1987.  Diagnosis-related groups. A critical assessment of the provision for comorbidity.. Med Care. 25(10):1011-4.

Porter D, Leviton A, SLACK WV, Graham JR.  1981.  A headache chronicle: the daily recording of headaches and their correlates.. J Chronic Dis. 34(9-10):481-6.

Leviton A, Schulman J, Kammerman L, Porter D, Slack W, Graham JR.  1980.  A probability model of headache recurrence.. J Chronic Dis. 33(7):407-12.

Fisher LA, Johnson TS, Porter D, Bleich HL, SLACK WV.  1977.  Collection of a clean voided urine specimen: a comparison among spoken, written, and computer-based instructions.. Am J Public Health. 67(7):640-4.

Witschi J, Porter D, Vogel S, Buxbaum R, Stare FJ, Slack W.  1976.  A computer-based dietary counseling system.. J Am Diet Assoc. 69(4):385-90.

Slack W, Porter D, Witschi J, Sullivan M, Buxbaum R, Stare FJ.  1976.  Dietary interviewing by computer. An experimental approach to counseling.. J Am Diet Assoc. 69(5):514-7.