Specifics of Building Envelope Air Leakage Problems and Airtightness MeasurementsAnatolijs Borodinecs, Jekaterina Nazarova, Aleksandrs Zajacs, Alexandr Malyshev and Vladimir ProninMATEC Web Conf., 73 (2016) 02020DOI: https://doi.org/10.1051/matecconf/20167302020