@article{149411, author = {Hui-Min Huang and Richard Quintero and James Albus}, title = {A Reference Model, Design Approach, and Development Illustration toward Hierarchical Real-Time System Control for Coal Mining Operations}, year = {1991}, month = {1991-07-01}, publisher = {Advances in Control & Dynamic Systems}, url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=820357}, language = {en}, }