@misc{_heavy_metals_1995, author={ title={Heavy Metals: Problems and Solutions - Environmental Science}, year={1995}, howpublished = {book}, note = {Online available at: \url{} (DOI). Salomons, W.; Foerstner, U.; Mader, P. (Ed.): Heavy Metals: Problems and Solutions - Environmental Science. Berlin: Springer. 1995.}}