EntityQ4942925· pop 5· linked from 7 articlesbook graphSign in to saveone of two types of graph: quadrilateral books and square booksConnectionstriangleEntityquadrilateralEntitydigital object identifierEntityPaul ErdősEntitygraph theoryEntityQ118398EntityStegosauriaEntityMathWorldEntityQ22908627EntityEric W. WeissteinEntitycomplement graphEntityMathematical ReviewsEntityRamsey's theoremEntitystar graphEntitythagomizerEntitysplit graphEntityCartesian product of graphsEntitygraph labelingEntityIsrael Journal of MathematicsEntityJournal of Combinatorial TheoryEntityCategoriesParametric families of graphsPlanar graphs