On Convex Developments of a Doubly-Covered Square -- Flat 2-Foldings of Convex Polygons -- Uniform Coverings of 2-Paths with 6-Paths in the Complete Graph -- Foldings of Regular Polygons to Convex Polyhedra I: Equilateral Triangles -- Maximum Induced Matchings of Random Regular Graphs -- Antimagic Valuations for the Special Class of Plane Graphs -- A General Framework for Coloring Problems: Old Results, New Results, and Open Problems -- Crossing Numbers and Skewness of Some Generalized Petersen Graphs -- Some Conditions for the Existence of (d,k)-Digraphs -- Subdivision Number of Large Complete Graphs and Large Complete Multipartite Graphs -- On a Triangle with the Maximum Area in a Planar Point Set -- A Balanced Interval of Two Sets of Points on a Line -- Spanning Trees of Multicoloured Point Sets with Few Intersections -- Regular Factors Containing a Given Hamiltonian Cycle -- Disjoint Edges in Topological Graphs -- The Decycling Number of Cubic Graphs -- Equal Area Polygons in Convex Bodies -- Maximum Order of Planar Digraphs -- (a,d)-Edge-Antimagic Total Labelings of Caterpillars -- An Upper Bound for the Ramsey Number of a Cycle of Length Four Versus Wheels -- Constructions for Nonhamiltonian Burkard-Hammer Graphs -- A Characterization of Polygonal Regions Searchable from the Boundary -- ?-Optimum Exclusive Sum Labeling of Certain Graphs with Radius One.