Present energy performance requirements and nZEB targets in some selected countriesKurnitski, Jarek; Feldmann, ChristianCost optimal and nearly zero-energy buildings (nZEB) : definitions, calculation principles and case studies2013 / p. 31-46 : ill https://doi.org/10.1007/978-1-4471-5610-9_3 Article collection metrics at Scopus Article at Scopus