@article{IJAMCS_2001_11_6_a7,
     author = {Staffans, O. J.},
     title = {J-energy preserving well-posed linear systems},
     journal = {International Journal of Applied Mathematics and Computer Science},
     pages = {1361--1378},
     publisher = {mathdoc},
     volume = {11},
     number = {6},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IJAMCS_2001_11_6_a7/}
}