@misc{Toppila_Sakari_On,
 author={Toppila, Sakari and Lounesto, Pertti (1945- )},
 howpublished={online},
 publisher={nakł. UMCS},
 language={eng},
 type={artykuł},
 title={On a Conjecture of Hellerstein, Shen and Williamson},
 keywords={matematyka},
}