1. Tevatronic LTD.
http://tevatronic.net/
. Accessed 1 May 2019
2. Pessl Instruments GmbH.
http://metos.at/fieldclimate/
. Accessed 11 Nov 2018
3. Davis Instruments.
https://www.davisinstruments.com/
. Accessed 16 Jan 2019
4. ENORASIS.
https://cordis.europa.eu/project/id/282949
. Accessed 3 Sept 2018
5. WAZIUP.
https://www.waziup.eu/
. Accessed 11 Sept 2019