1. Research productivity in a system of universities;Adams;Annales d’Économie et de Statistique,1998
2. Distinguishing engineers from scientists;Allen,1988
3. Departmental effects on scientific productivity;Allison;American Sociological Review,1990
4. A Research Activity Index of Major Research Universities;Ashton,1984
5. Research activity in American universities;Ashton;NACUBO Business Officer,1986