Erlykin, Anatoly D., and Arnold W. Wolfendale. “DO WE SEE THE ‘IRON PEAK’?”. Acta Polytechnica 53, no. A (December 18, 2013): 724–727. Accessed December 12, 2024. https://ojs.cvut.cz/ojs/index.php/ap/article/view/1961.