ΟΙΚΟΝΟΜΙΑ ΣΤΗ ΧΡΗΣΗ ΤΗΣ ΕΝΕΡΓΕΙΑΣ

https://atheo.gr/%cf%86%ce%b513-%ce%bf%ce%b9%ce%ba%ce%bf%ce%bd%ce%bf%ce%bc%ce%b9%ce%b1-%cf%83%cf%84%ce%b7-%cf%87%cf%81%ce%b7%cf%83%ce%b7-%cf%84%ce%b7%cf%83-%ce%b5%ce%bd%ce%b5%cf%81%ce%b3%ce%b5%ce%b9%ce%b1%cf%83/ 

http://daskalosa.eu/physics_st/st_fysika_01_energeia_2.html#fysika_st_oikonomia_energeias