Planetary detection limits taking into account stellar noise - I. Observational strategies to reduce stellar oscillation and granulation effectsX. Dumusque, S. Udry, C. Lovis, N. C. Santos and M. J. P. F. G. MonteiroA&A, 525 (2011) A140DOI: https://doi.org/10.1051/0004-6361/201014097