Manuel de la Sen. On positivity of singular regular linear time-delay time-invariant systems subject to multiple internal and external incommensurate point delays. Applied Mathematics and Computation, 190(1):382-401, 2007. [doi]
@article{Sen07c,
title = {On positivity of singular regular linear time-delay time-invariant systems subject to multiple internal and external incommensurate point delays},
author = {Manuel de la Sen},
year = {2007},
doi = {10.1016/j.amc.2007.01.053},
url = {http://dx.doi.org/10.1016/j.amc.2007.01.053},
researchr = {https://researchr.org/publication/Sen07c},
cites = {0},
citedby = {0},
journal = {Applied Mathematics and Computation},
volume = {190},
number = {1},
pages = {382-401},
}