TEA entsüklopeedia
2010
https://www.ester.ee/record=b2607773*est
TEA entsüklopeedia
2011
https://www.ester.ee/record=b2666688*est
TEA entsüklopeedia
2011
https://www.ester.ee/record=b2712813*est
TEA entsüklopeedia
2012
https://www.ester.ee/record=b2772002*est
TEA entsüklopeedia
2012
https://www.ester.ee/record=b2869027*est
TEA entsüklopeedia
2013
https://www.ester.ee/record=b2925120*est