@article{oai:waseda.repo.nii.ac.jp:00011372,
 author = {Hasegawa, Takehiro and 長谷川, 武博},
 journal = {学術研究. 数学編 = Gakujutsu kenkyu. Mathematics},
 month = {Feb},
 pages = {31--40},
 title = {有限体上の函数体の塔の漸近的zeta函数 : その一},
 volume = {55},
 year = {2007}
}