１　ＥｋｅｌａｎｄＩ．Ｎｏｎｃｏｎｖｅｘｍｉｎｉｍｉｚａｔｉｏｎｐｒｏｂｌｅｍｓ．ＢｕｌｌＡｍ ＭａｔｈＳｃｉ，１９７９，１：４４３－４７４
２　ＡｚｏｒｅｒｏＪＧ，ＡｌｏｎｓｏＩＰ．Ｍｕｌｔｉｐｌｉｃｉｔｙｏｆｓｏｌｕｔｉｏｎｓｆｏｒｅｌｌｉｐｔｉｃｐｒｏｂｌｅｍｓｗｉｔｈｃｒｉｔｉｃａｌｅｘｐｏｎｅｎｔｏｒｗｉｔｈａｎｏｎｓｙｍｍｅｔｒｉｃ ｔｅｒｍ．ＴｒａｎｓＡｍ ＭａｔｈＳｏｃ，１９９１，３２３（２）：８７－８９
３　ＨｅｉｎｏｎｅｎＪ，ＫｉｌｐｅｌＡｉｎｅｎＴ，ＭａｒｔｉｏＯ．Ｎｏｎｌｉｎｅａｒｐｏｔｅｎｔｉａｌｔｈｅｏｒｙｏｆｄｅｇｅｎｅｒａｔｅｅｌｌｉｐｔｉｃｅｑｕａｔｉｏｎｓ．ＯｘｆｏｒｄＵｎｉｖｅｒｓｉｔｙ Ｐｒｅｓｓ，１９９３
４　ＬｉＧｏｎｇｂａｏ，ＭａｒｔｉｏＯ．ＳｔａｂｉｌｉｔｙｉｎＯｂｓｔａｃｌｅｐｒｏｂｌｅｍｓ．ＭａｔｈＳｃａｎｄ，１９９４，７５：８７－１００
５　ＬｉＧｏｎｇｂａｏ，ＭａｒｔｉｏＯ．Ｓｔａｂｉｌｉｔｙｏｆｓｏｌｕｔｉｏｎｓｏｆｖａｒｙｉｎｇｄｅｇｅｎｅｒａｔｅｅｌｌｉｐｔｉｃｅｑｕａｔｉｏｎｓ．ＩｎｄｉａｎａＵｎｉｖｅｒｓｉｔｙＭａｔｈｅｍａｔｉｃｓＪｏｕｒｎａｌ，１９９８，４７（３）：８７３－８９１
６　ＧｉａｑｕｉｎｔａＭ．Ｇｕｌｔｉｐｌｅｉｎｔｅｇｒａｌｓｉｎｔｈｅｃａｌｃｕｌｓｏｆｖａｒｉａｔｉｏｎｓａｎｄｎｏｎｌｉｎｅａｒｅｌｌｉｐｔｉｃｓｙｓｔｅｍｓ．Ｐｒｉｎｃｅｔｏｎ，１９８３                                                                                                                                                       ７　ＰｅｔｒｉＪｕｕｔｉｎｅｎ．ＭｉｎｉｍｉｚａｔｉｏｎｐｒｏｂｌｅｍｓｆｏｒＬｉｐｓｃｈｉｔｚｆｕｎｃｔｉｏｎｓｖｉａｖｉｓｃｏｓｉｔｙｓｏｌｕｔｉｏｎｓ．ＡｎｎＡｃａｄＳｃｉＦｅｎｎＭａｔｈＤｉｓｓｅｒ
ｔａｔｉｏｎｓ，１９９８，１１５：１－５３
８　ＬｉｏｎｓＰＬ．Ｔｈｅｃｏｎｃｅｎｔｒａｔｉｏｎｃｏｍｐａｃｔｎｅｓｓｐｒｉｎｃｉｐｌｅｉｎｔｈｅｃａｌｃｕｌｕｓｏｆｖａｒｉａｔｉｏｎ，ｔｈｅｌｉｍｉｔｃａｓｅ，ｐａｒｔ１，２．Ｒｅｖ ＭａｔＩｂｅｒｏａｍｅｒｉｃａｎａ，１９８５，１：１４５－２０１；２：４５－１２１
９　ＹａｎｇＪｉａｎｆｕ．Ｐｏｓｉｔｉｖｅｓｏｌｕｔｉｏｎｓｏｆｑｕａｓｉｌｉｎｅａｒｅｌｌｉｐｔｉｃｏｂｓｔａｃｌｅｐｒｏｂｌｅｍｓｗｉｔｈｃｒｉｔｉｃａｌｅｘｐｏｎｅｎｔｓ．ＮｏｎｌｉｎｅａｒＡｎａｌｙｓｉｓ，Ｔｈｅｏｒｙ，Ｍｅｔｈｏ犱ｓ＆ Ａｐｐｌｉｃａｔｉｏｎｓ，１９９５，２５（１２）：１２８３－１３０６
１０　ＲａｎＱｉｋａｎｇ，ＦａｎｇＡｉｎｏｎｇ．ＥｘｉｓｔｅｎｃｅｏｆｉｎｆｉｎｉｔｅｌｙｍａｎｙｓｏｌｕｔｉｏｎｓｏｎａｃｌａｓｓｒｌｌｉｐｔｉｃｅｑｕａｔｉｏｎｓｗｉｔｈＮｅｕｍａｎｎｐｒｏｂｌｅｍ．ＣｈｉｎｅｓｅＪｏｕｒｎａｌｏｆＣｏｎｔｅｍｐｏｒａｒｙ Ｍａｔｈｅｍａｔｉｃｓ，２０００，２１（２）：８７－９５