@article{Papavassiliou_1990,
title={New tetraheterafulvalenes,
metal 1,
2-diheterolenes and some of their products},
volume={62},
ISSN={0033-4545},
url={http://dx.doi.org/10.1351/pac199062030483},
DOI={10.1351/pac199062030483},
number={3},
journal={Pure and Applied Chemistry},
publisher={Walter de Gruyter GmbH},
author={Papavassiliou,
G. C.},
year={1990},
month=jan,
pages={483–484} }