Daly, Edward, Nick McCarthy, John O’Halloran, Sandra Irwin, and Milo Ó Rathaille. 2014. “Effect of Forest Litter Depth on Seed Germination Efficacy of Rhododendron Ponticum.”. Irish Forestry, November. https://journal.societyofirishforesters.ie/index.php/forestry/article/view/10133.