@article{IJAMCS_2001_11_6_a2,
     author = {Iglesias, P. A. and Zang, G.},
     title = {Szego's {First} {Limit} {Theorem} in {Terms} of a {Realization} of a {Continuous-Time} {Time-Varying} {System}},
     journal = {International Journal of Applied Mathematics and Computer Science},
     pages = {1261--1276},
     publisher = {mathdoc},
     volume = {11},
     number = {6},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IJAMCS_2001_11_6_a2/}
}