Biktimirova, R., and V. . Abramenko. “Sunspot Magnetic Fields: A Comparison Between the CrAO and SDO/HMI Data”. Acta Astrophysica Taurica, vol. 1, no. 2, Dec. 2020, pp. 1-5, doi:10.31059/aat.vol1.iss2.pp1-5.