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Gil, J., Friedhelm Meyer auf der Heide, and A. Wigderson. “Not All Keys Can Be Hashed in Constant Time.”https://doi.org/10.1145/100216.100247__In Proceedings of the Twenty-Second Annual ACM Symposium on Theory of Computing  - STOC ’90, 1990.https://doi.org/10.1145/100216.100247 .
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Meyer auf der Heide, Friedhelm. “Das Heinz Nixdorf-Institut Der Universität-GH Paderborn.” Informatik Spektrum 13, no. 4 (1990): 231–32.
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Domik, Gitta, E.W. Brugel, and R.E. Stencel. “IRAS On-Line Catalogs at CASA.” In Proceedings of the 176th Meeting of the American Astronomical Society, Vol. Vol. 22. BAAS, 1990.
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Fuchssteiner, Benno, and Gudrun Oevel. “Action-Angle Representation of Multisolitons.” Appl. Math. Lett., no. 3 (1990): 75–78.
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Oevel, Gudrun, Benno Fuchssteiner, and M. Blaszak. “Action/Angle Variables and Asymptotic Data.” In Nonlinear Evolution Equations and Dynamical Systems, edited by S. Carillo and O. Ragnisco. Berlin-Heidelberg-New York: Springer, 1990.
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Oevel, Gudrun, Benno Fuchssteiner, and M. Blaszak. “Action-Angle Representation of Multisolitons by Potentials of Mastersymmetries.” Prog. Theor. Phys. 83 (1990): 395–413.
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Oevel, Gudrun. Reduktion integrabler Systeme auf ihre Multisoliton Mannigfaltigkeiten. Universität-Gesamthochschule Paderborn, 1990.
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Haeb-Umbach, Reinhold, D. Rugar, T. Howell, and G. P. Coleman. “Coding and Signal Processing for a Magneto-Optic Resonant Bias Coil Overwrite Experiment.” In International Conference on Communication, Atlanta, 1990.
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Domik, Gitta, EW Brugel, RE Stencel, S Vasudevan, and J Pang. “Applications of IRAS Preprocessing at the Workstation.” In Bulletin of the American Astronomical Society, 22:828, 1990.
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