1. 7) RATY Kaj. Biological Activities of Actinomycetes and Fungi Isolated from Houses with Indoor Air Problems.. Proc. of Indoor Air'93. 1993. vol.4, p.238-240.
2. 8) MARONI Marco. Microbial Contamination in Buildings : Comparison between Seasons and Ventilation Systems.. Proc. of Indoor Air'93. (1993) vol.4, p.137-142.