@misc{Hayman_W._K._Distortion,
 author={Hayman, W. K. and Hinkkanen, Aimo},
 howpublished={online},
 publisher={nakł. UMCS},
 language={eng},
 type={artykuł},
 title={Distortion Estimates for Quasisymmetric Functions},
 keywords={matematyka},
}