title: International and Russian experience in protecting underground cavities
abstract: This article describes the key problems and vulnerabilities of underground caves, which must be addressed to preserve these unique natural sites for future generations. The article also presents the results of a study systematizing and summarizing international and Russian experience in underground caves conservation. It also provides general information on the legal framework that underpins the creation of protected areas that include underground caves. Documents not legally binding are cited, 
journal: Anthropogenic Transformation of Nature