title: Aynu ciyaarno ciyaarta kubadda cagta iyo teniska miiska.
abstract: David Ullinger waa horyaalkii aduunka ee Headis, ciyaar isku darsan teniska miiska iyo kubada cagta. Halkan, David wuxuu tababar la qaadanayaa shan jeer oo horyaalka adduunka ah Cornelius Döll oo jooga Cologne, Jarmalka. In kasta oo ku saleysan kubbadda cagta, kaqeybgalayaashu waxay isticmaali karaan oo keliya madaxooda.