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An indoor navigation system for the visually impaired.
Guerrero LA, Vasquez F, Ochoa SF. Guerrero LA, et al. Sensors (Basel). 2012;12(6):8236-58. doi: 10.3390/s120608236. Epub 2012 Jun 13. Sensors (Basel). 2012. PMID: 22969398 Free PMC article.