Ruzgys, A., R. Volvačiovas, and Česlovas Ignatavičius. “Analysis of Energy Consumption in Renovated Buildings and Simulation of the Payback Period”. Mokslas – Lietuvos Ateitis / Science – Future of Lithuania, vol. 5, no. 5, Dec. 2013, pp. 513-9, doi:10.3846/mla.2013.80.