@misc{krull_compilation_of_1989, 
author={Krull, W.},
title={Compilation of backfitting measures for the FRG-1 and FRG-2 research reactors},
year={1989},
howpublished = {GKSS report},
note = {Krull, W.: Compilation of backfitting measures for the FRG-1 and FRG-2 research reactors. GKSS 89-E-57. 1989.}}