@misc{İlhan_Utku_Optimum,
 author={İlhan, Utku},
 address={Koszalin},
 howpublished={online},
 publisher={Publishing House of the Koszalin University of Technology},
 language={eng},
 type={artykuł w czasopiśmie},
 title={Optimum insulation thickness for pipes in district heating systems – review},
 keywords={optimum insulation thickness, district heating, energy saving, pipe insulation, heating degree-days, life cycle cost},
}