@inbook {MR2905715, title = {Spectra and leading directions for linear {DAE}s}, booktitle = {Control and optimization with differential-algebraic constraints}, series = {Adv. Des. Control}, volume = {23}, year = {2012}, pages = {59{\textendash}78}, publisher = {SIAM, Philadelphia, PA}, organization = {SIAM, Philadelphia, PA}, doi = {10.1137/9781611972252.ch4}, url = {http://db.lic.vnu.edu.vn:2080/10.1137/9781611972252.ch4}, author = {Linh, Vu Hoang and Mehrmann, Volker} }