@article{oai:uec.repo.nii.ac.jp:00007304,
 author = {宇佐美, 興一 and 金井, 文夫 and 山中, 惣之助 and Usami, Koichi and Kanai, Fumio and Yamanaka, Sonosuke},
 issue = {1},
 journal = {電気通信大学学報, Reports of the University of Electro-Communications},
 month = {Aug},
 pages = {11--15},
 title = {可変周波数および選択度狭帯域能動フィルタ},
 volume = {22},
 year = {1971},
 yomi = {ウサミ, コウイチ and カナイ, フミオ and ヤマナカ, ソウノスケ}
}