1. Wargocki P, Seppänen O, Andersson J, Boerstra A, Clements-Croome D, Fitzner K, et al. In: Wargocki P, Seppänen O (editors). Indoor climate and productivity in offices—how to integrate productivity in life-cycle cost analysis of building services, REHVA Guidebook no 6. Finland: Rehva, 2006.
2. Fisk WJ, Seppänen O. Providing better indoor environmental quality brings economic benefits, Key-note lectures. In: Proceedings of the Clima 2007 Wellbeing Indoors conference, Helsinki, Finland, 2007.
3. Ventilation and performance in office work;Seppänen;Indoor Air,2006
4. Estimates of potential nationwide productivity and health benefits from better indoor environments: an update;Fisk,2001
5. Bayesian networks and decisions graphs;Jensen,2001