@inproceedings{iiasa4034,
       booktitle = {Proceedings of a Symposium on International Nuclear Safeguards (IAEA-SM-333/7)},
           title = {Recent developments in and present state of variable sampling},
            year = {1994},
             url = {https://pure.iiasa.ac.at/id/eprint/4034/},
          author = {Avenhaus, R. and Piehlmeier, G.}
}