Erik Luces Bernold, L. E., Lorenc, S. J., & Luces, E. (1997). Intelligent technology for truck crane accident prevention. Journal of Construction Engineering and Management, 123(3), 276–284. https://doi.org/10.1061/(ASCE)0733-9364(1997)123:3(276) Bernold, L. E., Lorenc, S. J., & Luces, E. (1997). On-line assistance for crane operators. Journal of Computing in Civil Engineering, 2(4), 248–259.