Minyue Fu, Andrzej W. Olbrot, Michael P. Polis. The edge theorem and graphical tests for robust stability of neutral time-delay systems. Automatica, 27(4):739-741, 1991. [doi]
@article{FuOP91,
title = {The edge theorem and graphical tests for robust stability of neutral time-delay systems},
author = {Minyue Fu and Andrzej W. Olbrot and Michael P. Polis},
year = {1991},
doi = {10.1016/0005-1098(91)90068-D},
url = {http://dx.doi.org/10.1016/0005-1098(91)90068-D},
researchr = {https://researchr.org/publication/FuOP91},
cites = {0},
citedby = {0},
journal = {Automatica},
volume = {27},
number = {4},
pages = {739-741},
}