L. J.P.S. et al.,  "Entropy of a rotating thin shell in the BTZ spacetime", in 14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proc., Massimo Bianchi, Robert T Jantzen, Remo Ruffini, Ed., Wold Scientific, 2018, pp. 1563-1566