Kujach, S., Grzywacz, T., Ziemann, E., Szymczak, R., Luszczyk, M., Laskowski, R. Julkaisussa Baltic Journal of Health and Physical Activity (2011) “...Szymczak, R....”
Grzywacz, T., Ziemann, E., Szymczak, R., Szczesna-Kaczmarek, A. Julkaisussa International Congress Mountain & Sport. Updating study and research from laboratory to field. 11th-12th November 2005. Rovereto (TN) - Italy. Programme and book of abstracts (2005) “...Szymczak, R....”