@misc{callies_fitting_discretized_1992, 
author={Callies, U., Eppel, D. P.},
title={Fitting discretized hyperbolic equations to measurements},
year={1992},
howpublished = {conference paper: ;},
note = {Callies, U.; Eppel, D.: Fitting discretized hyperbolic equations to measurements. In: Mathematical Research: Modelling uncertain data. 1992. 34-39.}}