Whalley, P.,
"The Social Practice of Independent Inventing",
Science, Technology, & Human Values, vol. 16, pp. 208-232, 1991.
Way, P. O., and E. Jamison,
Scientists and Engineers in Industrialized Countries: A comparison of characteristics for France, West Germany, Japan, the United Kingdom, and the United States, Washington, D.C., U.S. Dept. of Commerce, Bureau of the Census, Center for International Research, 1986.