Kiringe, J. W. “Ecological and Anthropological Threats to Ethno-Medicinal Plant Resources and Their Utilization in Maasai Communal Ranches in the Amboseli Region of Kenya”. Ethnobotany Research and Applications, vol. 3, Dec. 2005, pp. 231-42, https://ethnobotanyjournal.org/index.php/era/article/view/74.