Edelsbrunner, Herbert, Nany Hasan, Raimund Seidel, and Xiao Shen. “Circles through Two Points That Always Enclose Many Points.”https://doi.org/10.1007/BF00181432__Geometriae Dedicata. Springer, 1989.https://doi.org/10.1007/BF00181432 .

Edelsbrunner, Herbert, and Steven Skiena. “On the Number of Furthest Neighbor Pairs in a Point Set.”https://doi.org/10.1080/00029890.1989.11972250__American Mathematical Monthly. Mathematical Association of America, 1989.https://doi.org/10.1080/00029890.1989.11972250 .

Chazelle, Bernard, Herbert Edelsbrunner, Leonidas Guibas, and Micha Sharir. “A Singly Exponential Stratification Scheme for Real Semi-Algebraic Varieties and Its Applications.”https://doi.org/10.1007/BFb0035760__In 16th International Colloquium on Automata, Languages, and Programming, 372:179–93. Springer, 1989.https://doi.org/10.1007/BFb0035760 .

Chazelle, Bernard, Herbert Edelsbrunner, and Leonidas Guibas. “The Complexity of Cutting Complexes.”https://doi.org/10.1007/BF02187720__Discrete &; Computational Geometry. Springer, 1989.https://doi.org/10.1007/BF02187720 .

Barton, Nicholas H. “The Divergence of a Polygenic System under Stabilising Selection, Mutation and Drift.”https://doi.org/10.1017/S0016672300028378__Genetical Research. Cambridge University Press, 1989.https://doi.org/10.1017/S0016672300028378 .

Barton, Nicholas H, and Michael Turelli. “Evolutionary Quantitative Genetics: How Little Do We Know?”https://doi.org/10.1146/annurev.ge.23.120189.002005__Annual Review of Genetics. Annual Reviews, 1989.https://doi.org/10.1146/annurev.ge.23.120189.002005 .

Barton, Nicholas H. “Founder Effect Speciation.” In Speciation and Its Consequences, edited by Daniel Otte and John Endler. Sinauer Press, 1989.

Alur, Rajeev, and Thomas A Henzinger. “A Really Temporal Logic.”https://doi.org/10.1109/SFCS.1989.63473__In 30th Annual Symposium on Foundations of Computer Science, 164–69. FCOS. IEEE, 1989.https://doi.org/10.1109/SFCS.1989.63473 .