Some Computational and Theoretical Aspects of the Exponentiated   Generalized Nadarajah-Haghighi Distribution
  Real data from applications in the survival context have required the use of more flexible models. A new four-parameter model called the Exponentiated Generalized Nadarajah-Haghighi (EGNH) distribution has been introduced in order to verify this requirement. 
T. VedoVatto, A. D. C. Nascimento, W. R. Miranda Filho, M. C. S. Lima,   L. G. B. Pinho, G. M. Cordeiro
math.ST stat.TH