Andrzejewska , J. (2007). The research of vertical displacements of the rock mass inside and in environment of the Kletno Bear Cave. Записки Горного института, 170(2), 93-96. извлечено от https://pmi.spmi.ru/pmi/article/view/7722

Andrzejewska , J. (2007). Journal of Mining Institute, 170(2), 93-96. Retrieved from https://pmi.spmi.ru/pmi/article/view/7722