by Laicāns, M., Puķīte, I., Geipele, I., Zeltins, N., Greķis, A.
Published in Latvian journal of physics and technical sciences (01.10.2018)

by Pukite, I., Grekis, A., Geipele, I., Zeltins, N.
Published in Latvian journal of physics and technical sciences (01.08.2017)

by SHIPKOVS, P, KASHKAROVA, G, GREKIS, A
Year of Publication 2000

by Shipkovs, P., Kashkarova, G., Grekis, A.
Published in World Renewable Energy Congress VI (2000)

by Grekis, A. (Latvijas Attistibas agentura, Riga (Latvia). Energetikas departaments)
Published in Energija un Pasaule (Latvia) (2001)