Classification
EHA - Renewable energy sources
TEJ - Electric devices, mechanical devices, magnets, dielectrics
5
CNWK - Electric batteries
4
EBA - Energy production, energy technology
4
FJB - Electric materials
4
EVA - Energy demand, energy supply - comprehensive works
3
CNW - Electrochemical energy production and conversion
2
EIA - Solar energy - general
2
EKA - Wind energy
2
TED - Electric power - industrial aspect
2
TEDD - Electric power transmission
2
EIS - Solar cells
1
EMA - Hydroelectric, tidal energy
1
ENA - Energy from biomass and waste
1
ETA - Energy storage
1
EVN - Energy supply - future aspects
1
EVP - Energy models, energy system analysis
1
EWA - Energy economy
1
EXA - Energy policy
1
TGN - Control engineering
1
UHCH - Urban areas
1
UKE - Environment and energy resources
1
YPB - Economy - general aspects
1