Näf, J; Jetzer, P (2011). Gravitational radiation in quadratic f(R) gravity. Physical Review D, 84(2):024027.
Lubini, M; Tortora, C; Näf, J; Jetzer, P; Capozziello, S (2011). Probing the dark matter issue in f(R)-gravity via gravitational lensing. European Physical Journal C - Particles and Fields, 71(12):1834.
Näf, J; Jetzer, P (2010). On the 1/c expansion of f(R) gravity. Physical Review D, 81(10):104003-8pp.
Näf, J. Weak field tests of metric gravity theories. 2010, University of Zurich, Faculty of Science.
Näf, J; Jetzer, P; Sereno, M (2009). On gravitational waves in spacetimes with a nonvanishing cosmological constant. Physical Review D, 79(2):024014 .