Wirtanen, Theodore H. (1969). "Laser Multilateration". Journal of the Surveying and Mapping Division. 95 (1). American Society of Civil Engineers (ASCE): 81–92. doi:10.1061/jsueax.0000322. ISSN0569-8073.
Wirtanen, Theodore H. (1969). "Laser Multilateration". Journal of the Surveying and Mapping Division. 95 (1). American Society of Civil Engineers (ASCE): 81–92. doi:10.1061/jsueax.0000322. ISSN0569-8073.