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

Mediterranean GPS Network - BAKU-Baku P.S.
Start: 23-Aug-2007
End: 14-Nov-2022
Kadirov, Fakhraddin, Mammadov, Samir, Safarov, Rafig, Reilinger, Robert E., 2007, Mediterranean GPS Network - BAKU-Baku P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T2VB-N594