- Alpar, Paul; Hills, G.: An Analysis of Empirical Research in Entrepreneurship, Proceedings of the 5th Annual Conference of the United States Association for Small Business and Entrepreneurship, 1990, 67-73.
- Alpar, Paul: The Role of IS in Entrepreneurial Firms, Center for Research in Information Management, Working Paper No. 3, Univ. of Illinois at Chicago, 1989, 29 S.
- Alpar, Paul; Spitzer, D.: Response Behavior of Entrepreneurs in a Mail Survey, Entrepreneurship - Theory and Practice, Vol. 14, No. 2, Winter 1989, 31-44.
- Alpar, Paul; Spitzer, D.; Hills, G.: Business Planning in New, High Technology Firms, Frontiers of Entrepreneurship Research 1989, Proceedings of the 9th Annual Babson Conference on Entrepreneurship, 398-407.
- Alpar, Paul; Spitzer, D.; Hills, G.: Marketing Planning and Research Among High Technologie Entrepreneurs, Proceedings og the symposium on Research at the Marketing/Entrepreneurship Interface, 1989, 411-422.