@article {MR2269934,
	title = {Stability radii for linear time-varying differential-algebraic equations with respect to dynamic perturbations},
	journal = {J. Differential Equations},
	volume = {230},
	number = {2},
	year = {2006},
	pages = {579{\textendash}599},
	issn = {0022-0396},
	doi = {10.1016/j.jde.2006.07.004},
	url = {http://db.lic.vnu.edu.vn:2080/10.1016/j.jde.2006.07.004},
	author = {Nguyen Huu Du and Linh, Vu Hoang}
}
