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L. Greenhill, et al., “The Discovery of H2O Maser Emission in Seven Active Galactic Nuclei and at High Velocities in the Circinus Galaxy,” The Astrophysical Journal, Vol. 582, 2003, p. L11. doi:10.1086/367602

has been cited by the following article:

• TITLE: Entropy Change of Non-Spinning Black Holes w.r.t. the Radius of Event Horizon in AGN

  AUTHORS: Dipo Mahto, Md. Shams Nadeem, Umakant Prasad, Abhay Kumar, K. M. Singh

  KEYWORDS: Radius of Event-Horizon; AGN; Entropy

  JOURNAL NAME: Journal of Modern Physics, Vol.4 No.3, March 6, 2013

  ABSTRACT: In this research paper, we have used the formula for the change in entropy of Non-spinning black holes with respect to the change in the radius of event horizon (Mahto et al. 2012) and entropy of black holes (Hawking 1973 & Mahto et al. 2012) to calculate their values in Active Galactic Nuclei (AGN) which shows that the variation of change in entropy of black holes with respect to the radius of the event horizon/entropy of black holes with increasing the values of the radius of the event horizon of different test Non-spinning black holes are like a wave-pattern.