@article{SIGMA_2022_18_a81,
     author = {W. Steven Gray},
     title = {Entropy of {Generating} {Series} for {Nonlinear} {Input-Output} {Systems} and {Their} {Interconnections}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2022},
     volume = {18},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2022_18_a81/}
}