Li, L., & zhang, F. Instability Model of a Coal Wall with Large Mining Height under Excavation Unloading Conditions. Wiley.
Chicago Style (17th ed.) CitationLi, Lei, and Feng zhang. Instability Model of a Coal Wall with Large Mining Height Under Excavation Unloading Conditions. Wiley.
MLA (9th ed.) CitationLi, Lei, and Feng zhang. Instability Model of a Coal Wall with Large Mining Height Under Excavation Unloading Conditions. Wiley.
Warning: These citations may not always be 100% accurate.