@misc{Portenko_Mykola_On,
 author={Portenko Mykola and Kopytko Bohdan},
 howpublished={online},
 publisher={Wydaw. Politechniki Częstochowskiej},
 language={eng},
 title={On constructing a multidimensional diffusion process with a membrane located on a given hyperplane and acting in an oblique direction},
 type={artykuł},
 keywords={wielowymiarowy proces dyfuzji, multidimensional diffusion process},
}