@article{oai:ismrepo.ism.ac.jp:00032527,
 author = {前原, 濶 and Maehara, Hiroshi},
 issue = {2},
 journal = {統計数理研究所彙報},
 month = {Mar},
 pages = {81--86},
 title = {Sylvester の問題},
 volume = {25},
 year = {1978}
}