D. J. Hansen

发表

F. Wetmore, D. J. Hansen, 1956 .
R. Sacher, D. J. Hansen, S. K. Bellman, 1976 .
R. Huggett, A. J. Wilson, D. Nimmo, 1976, Science.
J. Luh, D. J. Hansen, 1989, Journal of the Australian Mathematical Society. Series A. Pure Mathematics and Statistics.