Comparison of motor coach exhaust emissions in real operating conditions for different testing proceduresDawid Gallas, Jerzy Merkisz, Maciej Andrzejewski, Sylwin Tomaszewski, Jan Strzemkowski and Stepan KinterMATEC Web Conf., 294 (2019) 02004DOI: https://doi.org/10.1051/matecconf/201929402004