6Ward C Y,Mewhirter E I.,Thompson W R. Evaluation of cool season turf species and planting techniques for overseeding bermudagrass golf greens [C]//Proceeding of the second international turfgrass research conference, 1972:480-495.
7James S. 1983-1992 turfgrass research summary [M], 1993.
8Anderson S F, Dudeck A E. An evaluation of cool-season turfgrasses for overseeding fairway and green bermudagrass [J]. Proceeding Soil and Crop Science of Florida,1995,54(9):5-11.
9Mazur A P,. Influence of plant growth regulators on wansion of bermudagrass pulting green oversecded with perennial ryegrass [J]. HortScience, 1988,113(3) :367-373.
10Longer D E. Overseeding warm season lawns with cool season turfgrass species [J]. Arkansas Agricultural Experiment Station, 1999,46(6):72-75.
