1. Backfilling roadway supports with “Bullflex” hoses;Breit;Gluckauf,1980
2. The development of new and improved types of roadway support;Final report on ECSC research project AB/8/801. Min. Res. Dev. Establ., Bretby, U.K.,1980
3. Improvement of final gateroad cross-section by scheduled backfilling with natural anhydrite;Haarman;Gluckauf,1981