共 50 条
- [23] Traveling salesman problems with profits [J]. TRANSPORTATION SCIENCE, 2005, 39 (02) : 188 - 205
- [26] Why Some Persistent Problems Persist [J]. AMERICAN POLITICAL SCIENCE REVIEW, 2019, 113 (04) : 980 - 996
- [27] CATV AND BROADCASTER . PROBLEMS OR PROFITS [J]. JOURNAL OF THE SOCIETY OF MOTION PICTURE TELEVISION ENGINEERS, 1970, 79 (01): : 41 - &