1.		Visitor monitoring along roads and hiking trails: How to determine usage levels in tourist sites / Isabelle D. Wolf, Gerald Hagenloh, David B. Croft Autor: Wolf, Isabelle D. Coautor: ; Hagenloh, Gerald Croft, David B. COTA(S): RE-1193
2.		Outcome-focused national park experience management: transforming participants, promoting social well-being, and fostering place attachment / Isabelle D. Wolf, Heidi K. Stricker, Gerald Hagenloh Autor: Wolf, Isabelle D. Coautor: ; Stricker, Heidi K. Hagenloh, Gerald COTA(S): RE-926