Table model and portable optical sensors for the monitoring of time-dependent liquid spreading over rough surfacesBenjamin Osae Asamoah, Boniphace Kanyathare and Kai-Erik PeiponenJ. Eur. Opt. Soc.-Rapid Publ., 14 1 (2018) 24DOI: https://doi.org/10.1186/s41476-018-0093-9