This data is licensed by the Creative Commons Attribution 4.0 Unported (CC-BY-SA-4.0) License. You have to cite the data in the following way:
Herrmann F. (2021); TERENO data from station(s) AGIA_CK_003 with parameter(s) Precipitation, Precipitation, Precipitation, Precipitation for time period 2021-03-01 to 2021-09-12; https://hdl.handle.net/20.500.11952/TERENO.AGIA_CK_003.1631476346978