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Edelsbrunner, H., &; Skiena, S. (1989). On the number of furthest neighbor pairs in a point set. American Mathematical Monthly. Mathematical Association of America.https://doi.org/10.1080/00029890.1989.11972250 
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Chazelle, B., Edelsbrunner, H., Guibas, L., &; Sharir, M. (1989). A singly exponential stratification scheme for real semi-algebraic varieties and its applications. In 16th International Colloquium on Automata, Languages, and Programming (Vol. 372, pp. 179–193). Stresa, Italy: Springer.https://doi.org/10.1007/BFb0035760 
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Chazelle, B., Edelsbrunner, H., &; Guibas, L. (1989). The complexity of cutting complexes. Discrete &; Computational Geometry. Springer.https://doi.org/10.1007/BF02187720 
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Barton, N. H. (1989). The divergence of a polygenic system under stabilising selection, mutation and drift. Genetical Research. Cambridge University Press.https://doi.org/10.1017/S0016672300028378 
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Barton, N. H., &; Turelli, M. (1989). Evolutionary quantitative genetics: how little do we know? Annual Review of Genetics. Annual Reviews.https://doi.org/10.1146/annurev.ge.23.120189.002005 
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Barton, N. H. (1989). Founder effect speciation. In D. Otte &; J. Endler (Eds.), Speciation and its consequences. Sinauer Press.
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Alur, R., &; Henzinger, T. A. (1989). A really temporal logic. In 30th Annual Symposium on Foundations of Computer Science (pp. 164–169). Research Triangle Park, NC, USA: IEEE.https://doi.org/10.1109/SFCS.1989.63473 
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