Elias, Melanie, and Hans-Gerd Maas. 2022. “Measuring Water Levels by Handheld Smartphones: A Contribution to Exploit Crowdsourcing in the Spatio-Temporal Densification of Water Gauging Networks”. The International Hydrographic Review, no. 27 (May):9-22. https://journals.lib.unb.ca/index.php/ihr/article/view/33130.