@techreport{Ruckriegel2015, author = {Karlheinz Ruckriegel}, title = {Zur Verwendung von "Subjektiven Indikatoren"}, series = {Sonderdruck / Schriftenreihe der Georg-Simon-Ohm-Hochschule, N{\"u}rnberg}, number = {58}, pages = {20 S.}, year = {2015}, }