@InProceedings{delfs1998classification,
	author = {Delfs, Christoph and Jondral, Frederich},
	title = {Classification of transient time-varying signals using dft and wavelet packet based methods},
	booktitle = {Proc. Int. Conf. Acoustics, Speech, and Signal Process. (ICASSP)},
	pages = {1569–1572},
	year = {1998},
}