BibTex format
@inproceedings{Drakakis:2001:10.1109/ISCAS.2001.921808,
author = {Drakakis, EM and Payne, AJ and Toumazou, C and Ng, AEJ and Sewell, JI},
doi = {10.1109/ISCAS.2001.921808},
pages = {141--144},
publisher = {IEEE},
title = {High-order lowpass and bandpass elliptic log-domain ladder filters},
url = {http://dx.doi.org/10.1109/ISCAS.2001.921808},
year = {2001}
}