@article{IJAMCS_2021_31_2_a1,
     author = {Grabowski, Piotr},
     title = {Comparison of direct and perturbation approaches to analysis of infinite-dimensional feedback control systems},
     journal = {International Journal of Applied Mathematics and Computer Science},
     pages = {195--218},
     publisher = {mathdoc},
     volume = {31},
     number = {2},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IJAMCS_2021_31_2_a1/}
}