A decomposition of complete bipartite graphs into edge-disjoint subgraphs with star components. - Yoshimi Egawa; Masatsugu Urabe; Toshihito Fukuda; Seiichiro Nagoya (Discret. Math., 1986)

On a Counterexample to a Conjecture of Mirzaian. - Masatsugu Urabe; Mamoru Watanabe (Comput. Geom., 1992)

Some combinatorial problems. - Jin Akiyama; Kiyoshi Hosono; Masatsugu Urabe (Discret. Math., 1993)

on a Partition into Convex Polygons. - Masatsugu Urabe (Discret. Appl. Math., 1996)

On circles containing the maximum number of points. - Jin Akiyama; Y. Ishigami; Masatsugu Urabe; Jorge Urrutia (Discret. Math., 1996)

Topics on line segments and polygons. - Kiyoshi Hosono; Masatsugu Urabe; Mamoru Watanabe (Discret. Math., 1996)

On a partition of point sets into convex polygons. - Masatsugu Urabe (CCCG, 1997)

On a disjoint quadrilateral partition for a given point se. - Kiyoshi Hosono; Masatsugu Urabe (CCCG, 1998)

On the Existence of a Point Subset with 4 or 5 Interior Points. - David Avis; Kiyoshi Hosono; Masatsugu Urabe (JCDCG, 1998)

Partitioning point sets in space into disjoint convex polytopes. - Masatsugu Urabe (Comput. Geom., 1999)

On Convex Decompositions of Points. - Kiyoshi Hosono; David Rappaport; Masatsugu Urabe (JCDCG, 2000)

On the number of disjoint convex quadrilaterals for a planar point set. - Kiyoshi Hosono; Masatsugu Urabe (Comput. Geom., 2001)

On the existence of a point subset with a specified number of interior points. - David Avis; Kiyoshi Hosono; Masatsugu Urabe (Discret. Math., 2001)

Partitioning a Planar Point Set into Empty Convex Polygons. - Ren Ding; Kiyoshi Hosono; Masatsugu Urabe; Changqing Xu (JCDCG, 2002)

On a Triangle with the Maximum Area in a Planar Point Set. - Kiyoshi Hosono; Ferran Hurtado; Masatsugu Urabe; Jorge Urrutia (IJCCGGT, 2003)

On the Minimum Size of a Point Set Containing Two Non-intersecting Empty Convex Polygons. - Kiyoshi Hosono; Masatsugu Urabe (JCDCG, 2004)

Constructions from empty polygons. - Tibor Bisztriczky; Kiyoshi Hosono; Gyula Károlyi; Masatsugu Urabe (Period. Math. Hung., 2004)

A Minimal Planar Point Set with Specified Disjoint Empty Convex Subsets. - Kiyoshi Hosono; Masatsugu Urabe (KyotoCGGT, 2007)

Specified holes with pairwise disjoint interiors in planar point sets. - Kiyoshi Hosono; Masatsugu Urabe (AKCE Int. J. Graphs Comb., 2020)