• Madalpingelised elektripaigaldisedRisthein, Endel2007 https://www.ester.ee/record=b2258244*est
• Madalpingelised elektripaigaldisedRisthein, Endel2007 https://www.ester.ee/record=b2261099*est
• Madalpingelised elektripaigaldisedRisthein, Endel2007 https://www.ester.ee/record=b2639631*est
• Madalpingelised elektripaigaldisedRisthein, Endel2007 https://www.ester.ee/record=b2307510*est
• Madalpingelised elektripaigaldisedKroon, Kalju; Risthein, Endel2007 https://www.ester.ee/record=b2261047*est
• Madalpingelised elektripaigaldisedRisthein, Endel2009 https://www.ester.ee/record=b2466695*est
• Madalpingelised elektripaigaldisedRisthein, Endel2009 https://www.ester.ee/record=b2510116*est
• Madalpingelised elektripaigaldisedKroon, Kalju; Risthein, Endel2009 https://www.ester.ee/record=b2510120*est
• Madalpingelised elektripaigaldisedKroon, Kalju; Risthein, Endel2009 https://www.ester.ee/record=b2537048*est