Vavilova, I. B.; Vasylenko, A. A.; Babyk, I. V.; Pulatova, N. G. X-RAY SPECTRAL PROPERTIES OF THE ISOLATED AGNs: NGC 1050, NGC 2989, ESO 317-038, ESO 438-009. Одес. астроном. публ. 2016, 28, 150-153.