Broul , J. и Husárik , J. (2007) "Special Conditions of Transporting Routes Construction in Undermined Areas in Czech Republic", Записки Горного института, 170(2), сс. 97-99. доступно на: https://pmi.spmi.ru/pmi/article/view/7723 (просмотрено: 5 декабрь 2025).

Broul , J. and Husárik , J. (2007) "Special Conditions of Transportation Routes Construction in Undermined Areas in Czech Republic", Journal of Mining Institute, 170(2), pp. 97-99. Available at: https://pmi.spmi.ru/pmi/article/view/7723 (Accessed: 5 December 2025).