- A. Aggarwal and H. Imai and N. Katoh and S. Suri, Finding $k$ Points with Minimum Diameter and Related Problems,
*Journal of Algorithms*,**12**, 38-56, .

- H. Imai, A Geometric Fitting Problem of Two Corresponding Sets of Points on a Line,
*IEICE Transactions on Fundamentals of Electronics*,**E74**,**4**, 665-668, .

- H. Imai, On the Polynomiality of the Multiplicative Penalty Function Method for Linear Programming and Relatedee? Inscribed Ellipsoids,
*IEICE Transactions on Fundamentals of Electronics*,**E74**,**4**, 669-671, .

- N. Kojiro and K. Miura and H. Imai and Y. Kambayashi, Performance Evaluation of Automatic Name Placement Functions for Geographical Database Systems,
*Proceedings of the International Symposium on Database Systems for Advanced Applications*, 491-497, .

- T. Akutsu and Y. Aoki and S. Hasegawa and H. Imai and T. Tokuyama, The Sum of Smaller Endpoint Degree over Edges of Graphs and Its Applications to Geometric Problems,
*Proceedings of the 3rd Canadian Conference on Computational Geometry*, 145-148, .

- H. Imai and K. Imai, Some Geometric Fitting Problems of Two Corresponding Sets of Points and Applications to {VLSI} Layoutee? Design,
*15th IFIP Conference on System Modelling and Optimization*, 76-77, .

- S. Hasegawa and H. Imai and K. Hakata, An Analysis of Randomized Shear Sort on the Mesh Computer,
*Proceedings of the 2nd International Symposium on Algorithms*,**557**, 219-228, .

- H. Imai, Computational Geometry and Linear Programming,
*Proceedings of the 3rd Canadian Conference on Computational Geometry*, 166, .

- H. Imai, On Computational Geometry,
*38th Symposium on Geometry*,**2**, 160-166, .

- H. Imai, Some Results for the Multiplicative Penalty Function Method for Linear Programming,
*ISM Reports on Statistical Computing*,**35**, 9-13, .

- S. Hasegawa and H. Imai and K. Hakata, Analysis of Randomized Sorting Algorithms on the Mesh Computer Using Only Row and Column Sorting,
**SIGAL 91-AL-21-1**,*IPSJ SIG Notes*, , .

- K. Imai and H. Imai, On Arrangement of Surfaces in 3-Dimensional {Euclidean} Space,
**SIGAL 91-AL-21-8**,*IPSJ SIG Notes*, , .

- T. Akutsu and Y. Aoki and S. Hasegawa and H. Imai and T. Tokuyama, A Simple Proof of a Tight Bound of the Sum of Smaller Endpoint Degree over Edges of Graphs and Itsee? Applications to Geometric Problems.,
**SIGAL 91-AL-22-2**,*IPSJ SIG Notes*, , .

- K. Imai and H. Imai, On Arrangements of Algebraic Surfaces whose Intersection Curves are of Low Degrees in One Variable,
*RIMS Kokyuroku*,**754**, 220-227, .

- Y. Aoki, Estimating the Number of Simplices in Simplex Partition of $n$ Points,
*RIMS Kokyuroku*,**754**, 237-246, .

- Y. Aoki and T. Tokuyama and H. Imai, On the Complexity of the Dual Graph of an Arrangement,
*Tsuken Symposium on Discrete Algorithms*, 11-23, .