"Version: 20230501"--Title page verso.Includes bibliographical references.1. General introduction to the karst problem -- 1.1. Definitions -- 1.2. Distribution of karst types around the world -- 1.3. Some aspects of the karst problem -- 1.4. Sinkholes, their classification, and nomenclature2. An overview of geophysical methods suitable for karst problem resolving -- 2.1. Aspects of sinkhole haz…