@Book{Com98,
editor={A. Edalat and A. Jung and K. Keimel and M. Kwiatkowska},
title={Comprox III, Third Workshop on Computation and Approximation},
publisher={Elsevier},
year={1998},

volume={13},
series={Electronic Notes in Theoretical Computer Science},
address={},
edition={},
month={},
note={},
key={}
}