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Jager, E.; Karbach, J.; Gnjatic, S.; Neumann, A.; Bender, A.; Valmori, D.; Ayyoub, M.; Ritter, E.; Ritter, G.; Jäger, D.; more... Proceedings of the National Academy of Sciences of the United States of America (2006)
Kitamura, K.; Livingston, P. O.; Fortunato, S. R.; Stockert, E.; Helling, F.; Ritter, G.; Oettgen, H. F.; Old, L. J. Proceedings of the National Academy of Sciences of the United States of America (1995)
Houghton, A. N.; Mintzer, D.; Cordon-Cardo, C.; Welt, S.; Fliegel, B.; Vadhan, S.; Carswell, E.; Melamed, M. R.; Oettgen, H. F.; Old, L. J. Proceedings of the National Academy of Sciences of the United States of America (1985)
