The Existence of Near Generalized Balanced Tournament Designs
				
										Keywords:
				
				
																		near generalized balanced tournament  design, 													constant composition codes, 													optimal, 													existence															
			
			
										Abstract
In this paper, we complete the existence of near generalized balanced tournament designs (NGBTDs) with block size 3 and 5. As an application, we obtain new classes of optimal constant composition codes.