@base . a ; "2255-8772" ; . a ; . a ; "2255-8772" ; . "Latvia" . a ; ; "20220118155900.0"^^ ; ; . a , , ; , , ; "Renewable energy and energy efficiency." ; ; ; "2255-8772" ; ; "2255-8772" ; ; "2255-8772" ; "Renewable energy and energy efficiency." , "Renewable energy and energy efficiency" ; ; "http://llufb.llu.lv/conference/Renewable_energy_energy_efficiency/" . . a . a , ; "Renewable energy and energy efficiency" .