Rodgers, Michael, James McHale, and John Mulqueen. “Stability of Sitka Spruce on Mole-Drained and Ploughed Surface Water Gley Soil.”. Irish Forestry (November 1, 2006). Accessed April 27, 2024. https://journal.societyofirishforesters.ie/index.php/forestry/article/view/9979.