1. Development of time standard for multi-machine assignments with random interference;Ackermann,1977
2. The productivity of several machines under the care of one operator;Ashcroft;Journal of the Royal Statistical Society,1950
3. How many automatics should a man run?;Bernstein;Factory Management and Maintenance,1941
4. Elements of production planning and control;Eilon,1970
5. Teamwork maintenance;Gillespie;Industrial Engineering,1974