Extra cost analyses of two apartment buildings for achieving nearly zero and low energy buildingsPikas, Ergo; Thalfeldt, Martin; Kurnitski, Jarek; Liias, RoodeEnergy2015 / p. 623-633 : ill Window model and 5 year price data sensitivity to cost-effective facade solutions for office buildings in EstoniaThalfeldt, Martin; Pikas, Ergo; Kurnitski, Jarek; Voll, HendrikEnergy2017 / p. 685-697 : ill https://doi.org/10.1016/j.energy.2017.06.160