https://yerkramas.org/article/197009/promyshlennyj-alpinizm-v-moskve-vysota-kak-rabochaya-sredaMy webpage; https://www.bugulma.ws/publ/katalog_statej/promyshlennost/chto_skryvaet_professija_promyshlennogo_alpinista_v_rjukzake/36-1-0-4843
