@misc{_proceedings_of_1990, 
author={
title={Proceedings of the International Conference WELDING-90: Technology, Material, Fracture},
year={1990},
howpublished = {conference proceedings},
note = {Online available at: \url{} (DOI). Kocak, M. (Ed.): Proceedings of the International Conference WELDING-90: Technology, Material, Fracture. 1990.}}