@misc{Oleksyn_Jacek_Influence_1980,
 author={Oleksyn, Jacek},
 volume={25},
 editor={Polska Akademia Nauk. Instytut Dendrologii},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 address={Poznań ; Warszawa},
 journal={Arboretum Kórnickie},
 howpublished={online},
 year={1980},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={mul},
 title={Influence of sun spot activity on the cyclic changes in annual rings width in Scots Pine and Pitch Pine from the Niepołomice Forest},
 type={Text},
 URL={http://rcin.org.pl/Content/159369/PDF/KOR001_147781.pdf},
 keywords={Pinus sylvestris, scots pine, Pinus rigida, pitch pine, annual rings width},
}