The following information obtained from UNAVCO's online DOI system:
(https://www.unavco.org/data/doi/search/search.html)

Azerbaijan GPS Network - QABL-Gabala P.S.
Start: 19-Apr-2019
End: 31-Oct-2022
Kadirov, Fakhraddin, Mammadov, Samir, Safarov, Rafig, Reilinger, Robert E., 2019, Azerbaijan GPS Network - QABL-Gabala P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/F2JQ-D709