Three-dimensional radiative transfer in clumped hot star winds - I. Influence of clumping on the resonance line formationB. Šurlan, W.-R. Hamann, J. Kubát, L. M. Oskinova and A. FeldmeierA&A, 541 (2012) A37DOI: https://doi.org/10.1051/0004-6361/201118590