APA: 
Yan, Qi, Jin, Xian'an (2022). A-trails of embedded graphs and twisted duals. 
Ars mathematica contemporanea, letnik 22, številka 2, P2.06 (16 str.). 
URN:NBN:SI:DOC-V9D75SDV from http://www.dlib.si
 
                           MLA: 
Yan, Qi, Jin, Xian'an. "A-trails of embedded graphs and twisted duals." 
Ars mathematica contemporanea letnik 22. številka 2 (2022) P2.06 (16 str.).
<http://www.dlib.si/?URN=URN:NBN:SI:DOC-V9D75SDV>