@misc{markert_computeraided_sampling_1990, 
author={Markert, B.,Klausmeyer, N.},
title={Computer-aided sampling of the environment (CASE) for multi-element analysis},
year={1990},
howpublished = {book part},
note = {Online available at: \url{} (DOI). Markert, B.; Klausmeyer, N.: Computer-aided sampling of the environment (CASE) for multi-element analysis. In: Lieth, H.; Markert, B. (Ed.): Element concentration cadasters in ecosystems: Methods of assessment and evaluation. Weinheim: VCH. 1990. 81-89.}}