Ewert A.
1985 Why People Climb: The Relationship of Participant Motives and Experience Level to Mountaineering. Journal of Leisure Research 17:241-250
1987 Recreation in the outdoor setting:A focus on Adventure-Based Rec-reational Experiences.leisure Information Quarterly 14:5-7
1989 Outdoor Adventure Pursuits: Foundations Models and Theories.Columbus OH: Publishing Horizons
1993 Differences in the Level of Motive Importance Based on Trip Outcome Experience Level and Group Type journal of leisure Research 25:335-349
1994 Playing the Edge Motivation and Risk Taking in a High-Altitude Wildernesslike Environment Environment and Behavior 26:3-24.Ewert A and S Hollenhorst
1989 Testing the Adventure Model:Empirical Support for a Model of Risk Recreation Participation journal of leisure research 21:124-139
1994 Individual and Setting Attributes of the Adventure Recreation Experience Leisure Sciences 16:177-191.Gottlieb A.