Solar heat generation in Estonia and its peculiaritiesTomson, Teolan; Maivel, Mikk; Voll, HendrikEurosun 2010 : International Conference on Solar Heating, Cooling and Buildings : 28 September - 1 October 2010, Graz, Austria : book of abstracts2010 / p. 55 https://www.researchgate.net/publication/299641743_Solar_Heat_Generation_in_Estonia_and_its_Peculiarities

Solar heat generation in Estonia and its peculiaritiesTomson, Teolan; Maivel, Mikk; Voll, HendrikProceedings of the Eurosun2010 International Conference on Solar Heating, Cooling and Buildings : 28 September - 1 October 2010, Graz, Austria2010 / p. 10-18 https://www.researchgate.net/publication/299641743_Solar_Heat_Generation_in_Estonia_and_its_Peculiarities