Hoang Thai, N., Hoang, T. T. H., Dufey, J., & Pham Quan Ha. (2006). Clay Mineralogy and quantity/intensity relationship of potassium in Thua Thien Hue cosatal sandy soils. Vietnam Journal of Soil Science, 26, 42-46. https://hdl.handle.net/2078.5/34458 (Original work published 2006)