?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Marcak%2C+Henryk&rft.aulast=Marcak&rft.aufirst=Henryk&rft.date=September+2011&rft.title=The+seismic+activity+due+to+the+bending+on+exploited+seam+roof&rft.genre=proceeding