1. Alferdinck, J. W. A. M., Luoma, J., Rämä, P., Van Dorresteijn, M. J., & Harjula, V. (1998). Recognition and preference of pictograms for variable message signs (TNO-report TM-98-C046). Soesterberg, The Netherlands: TNO Human Factors Research Institute
2. Harjula, V., Luoma, J., & Rämä, P. (1998). Driver acceptance of a variable message sign displaying bilingual messages by turns. In Proceedings of the Fifth World Congress on Intelligent Transport Systems. Seoul: Vertis, ITS America, Ertico
3. Luoma, J. (1991). Perception of highway traffic signs: Interaction of eye movements, recalls and reactions. In A. G. Gale, I. D. Brown, C. M. Haslegrave, I. Moorhead, & S. Taylor, Vision in Vehicles – III (pp. 325–332). Amsterdam: Elsevier (North-Holland)
4. Luoma, J. (1992). Effect of being a test subject on driver performance. In Paper presented at the 71st Annual Meeting of the Transportation Research Board (Paper No. 920090). Washington, DC: National Academy of Sciences, Transportation Research Board, 7 pp
5. Luoma, J. (1993). Effects of delay on recall of road signs: An evaluation of the validity of recall method. In A. G. Gale, I. D. Brown, C. M. Haslegrave, H. W. Kruysse, & S. P. Taylor, Vision in Vehicles – IV (pp. 169–175). Amsterdam: Elsevier (North-Holland)