S. Hader and Hamprecht, F. A.,
“Efficient Density Clustering”,
Between Data Science and Applied Data Analysis. Springer, pp. 39-48, 2003.
U. Schimpf, Frew, N. M., Kalkenings, R., Garbe, C. S., and Jähne, B.,
“Observational studies of parameters influencing air--sea gas exchange”, in
Geophysical Research Abstracts, 2003, vol. 5, p. 09328.