Cyclic and heteroclinic flows near general static spherically symmetric   black holes: Semi-cyclic flows -- Addendum and corrigendum
  We present new accretion solutions of a polytropic perfect fluid onto an f(R)-gravity de Sitter-like black hole. We consider two f(R)-gravity models and obtain finite-period cyclic flows oscillating between the event and cosmological horizons as well as semi-cyclic critical flows executing a two-way motion from and back to the same horizon. Besides the generalizations and new solutions presented in this work, a corrigendum to Eur. Phys. J. C (2016) 76:280 is provided. 
Mustapha Azreg-A\"inou
gr-qc astro-ph.GA