Deep foundations on bored and auger piles : BAP III : proceedings of the 3rd International Geotechnical Seminar on Deep Foundations on Bored and Auger Piles, Ghent, Belgium, 19-21 Oct., 1998 / edited by W.F. van Impe & W. Haegeman. - Van Impe, W. F.; Haegeman, W. (A.A. Balkema, 1998)