All materials presented during the scientific sessions submitted as manuscripts will be published in the Pseudokarst Newsletter no. 30. that includes: field session guidebook and papers accepted by the Scientific Committee. The proposed length of papers is up to 8 pages A4 of a text (Times New Roman 12pt, line spacing 1,5), i.e. maximum 15 000 characters, including reference list and figures. The text should be sent as a WORD file, whereas figures should be prepared as JPG files of high quality (scanned maps will not be accepted, except for historical materials).