@misc{25+kv+ac+railway+line+within+3+kv+dc+infrastructure+in+poland+analysis+of+operating+conditions, author = {Szeląg, Adam}, title = {25 kV AC railway line within 3 kV DC infrastructure in Poland – analysis of operating conditions}, journal = {Technical Transactions}, address = {Kraków}, publisher = {Wydawnictwo PK}, date = {2016}, number = {Y. 113, iss. 1-E} }