@misc{Bystrek_Jan_(1934-_)_Usnea,
 author={Bystrek, Jan (1934- ) and Leśniewska, Joanna},
 howpublished={online},
 publisher={Wydaw. UMCS},
 language={eng},
 type={czasopismo elektroniczne},
 title={Usnea jørgenseniana Bystr. & Leśniewska sp. nova Usnea (subgen. Usnea, Parmeliaceae) in Sweden},
 keywords={Usnea jørgenseniana Bystr. & Leśniewska sp. nova, (Ascolichenes), taxonomy},
}