@misc{krueger_nctart_a_1988, 
author={Krueger, A.},
title={NCT-ART: a neutron computer tomography code based on the algebraic reconstruction technique},
year={1988},
howpublished = {GKSS report},
note = {Krueger, A.: NCT-ART: a neutron computer tomography code based on the algebraic reconstruction technique. GKSS 88-E-14. 1988.}}