@article{TUW-110088, author = {Hlawatsch, Franz and Boudreaux-Bartels, G.F.}, title = {Linear and quadratic time-frequency signal representations}, journal = {IEEE Signal Processing Magazine}, year = {1992}, volume = {vol. 9}, number = {no. 2}, pages = {21--67}, url = {http://publik.tuwien.ac.at/files/pub-et_10998.pdf} }