@inproceedings{CTT100629378,
  author = {Hiroki Sato and Zhishan Xu and Nicodimus Retdian and Shigetaka Takagi},
  title = {Low-Power Leapfrog Bandpass Filter with Transmission Zeros Using Integrators and Resistor-Based Addition Circuits},
  booktitle = {Proc. of the 20th European Conference on Circuit Theory and Design (ECCTD 2011)},
  year = 2011,
}

@inproceedings{CTT100624551,
  author = {佐藤広生 and 徐 志善 and ニコデムスレディアン and 佐藤隆英 and 高木茂孝},
  title = {抵抗加算器とOTA-C積分器を用いて零点を持つフィルターの構成},
  booktitle = {電子回路研究会資料},
  year = 2011,
}