@techreport{weko_32672_1,
   author	 = "Shiow-FenHwang and GerardJ.Chang",
   title	 = "k - Neighborhood Covering and Independence Problems",
   year 	 = "1989",
   institution	 = "Department of Applied Mathematics  National Chiao Tung University, Department of Applied Mathematics  National Chiao Tung University",
   number	 = "98(1989-AL-012)",
   month	 = "nov"
}