K. Sima Annika, M. Szettele Anna-Lena, Neuberger Manfred, Fine and Ultrafine Particle Pollution Before and After a Smoking ban in the Catering Industry in Vienna, International Journal of Occupational and Environmental Medicine, Volume 1, Issue 2, 2021, Pages 18-28, ISSN 2690-0904, https://doi.org/10.14302/issn.2690-0904.ijoe-21-3736. (https://openaccesspub.orgijoe/article/1592) Keywords: Indoor air; particulate matter; fine particle mass; ultrafine particle number; particle surface; smoke-free legislation; smoking ban; second-hand smoke; catering industry; Vienna