APA: 
Golubovska, Elena, Čitkuševa Dimitrovska, Biljana, Golubovski, Roman (2023). Analytical estimation of the optimal PV panel tilt based on a clear-sky irradiance model. 
JET on-line
Journal of energy technology
, letnik 16, iss. 4, str. 41-53. 
URN:NBN:SI:doc-FT4GVIXV from http://www.dlib.si
MLA: 
Golubovska, Elena, Čitkuševa Dimitrovska, Biljana, Golubovski, Roman. "Analytical estimation of the optimal PV panel tilt based on a clear-sky irradiance model." 
JET on-line
Journal of energy technology
 letnik 16. iss. 4 (2023) str. 41-53.
<http://www.dlib.si/?URN=URN:NBN:SI:doc-FT4GVIXV>