On the characterization of hankel and toeplitz operators describing switched linear dynamic systems with point delays Egileak: De La Sen, M. Urtea: 2009 Aldizkaria: Abstract and Applied Analysis Liburukia: 2009, art. no. 670314 Informazio gehigarria http://www.scopus.com/inward/record.url?eid=2-s2.0-69449101809&partnerID=40&md5=904e49d86327455e025507ec38c52ca5