1. Acker, S.A., Boetsch, J.R., Bivin, M., Whiteaker, L., 2011a. Monitoring forest vegetation in the North Coast and Cascades Network: 2009 annual report. Natural Resource Technical Report NPS/NCCN/NRTR—2011/446. National Park Service, Fort Collins, Colorado.
2. Acker, S.A., Boetsch, J.R., Bivin, M., Whiteaker, L., Cole, C., 2011b. Monitoring forest vegetation in the North Coast and Cascades Network: 2010 annual report. Natural Resource Technical Report NPS/NCCN/NRTR—2011/496. National Park Service, Fort Collins, Colorado.
3. Acker, S.A., Boetsch, J.R., Bivin, M., Whiteaker, L., Cole, C., 2012. Monitoring forest vegetation in the North Coast and Cascades Network: 2011 annual report. Natural Resource Technical Report NPS/NCCN/NRTR—2012/615. National Park Service, Fort Collins, Colorado.
4. Two decades of stability and change in old-growth forest at Mount Rainier National Park;Acker;Northwest Sci.,2006
5. Composition, complexity, and tree mortality in riparian forests in the central Western Cascades of Oregon;Acker;For. Ecol. Manage.,2003