Peter Senge ... [et al.]. Peter Ebner ... [et al.] Peter Duff ... [et al.] Peter Ebner ... [et al. Peter Weibel ... [et al. Pieter Biesboer ... [et al.]. Peter Duff ... [et al. Peter M. Kenny ... [et al.] Peter M. Senge...[et al.] Peter Afflerbach ... [et al.].