1. F. Hejda, J. P. S. Lemos, O. B. Zaslavskii
    Extraction of energy from an extremal rotating electrovacuum black hole: Particle collisions in the equatorial plane
    Physical Review D 105 (2022) 024014(1)-024014(20).
  2. J. C. Feng, F. Hejda, S. Carloni
    Relativistic location algorithm in curved spacetime
    Physical Review D 106 (2022) 044034(1)-044034(19).