@article{Hen99,
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Photometry of Sun-like Stars}},
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}
@article{Leh11,
  title={{Continuous period search method and 
its application to the young solar analogue HD 116956}},
  author={Lehtinen, J. and Jetsu, L. and Hackman, T. and Kajatkari, P.
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  journal={\aap},
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  pages={A136},
  year={2011}
}