Evaluating sleepiness using force platform posturography. - Edward O. Haeggström; Pia M. Forsman; Anders E. Wallin; Esko Toppila; Ilmari Pyykkö (IEEE Trans. Biomed. Eng., 2006)

Virtual Reality in Posturography. - Timo Tossavainen; Esko Toppila; Ilmari Pyykkö; Pia M. Forsman; Martti Juhola; Jonathan Starck (IEEE Trans. Inf. Technol. Biomed., 2006)