@incollection{Suzuki12,
author = {Akimasa Suzuki and Taketoshi Iyota and Kazuhiro Watanabe},
title = {Real-Time Distance Measurement for Indoor Positioning System Using Spread Spectrum Ultrasonic Waves},
booktitle = {Ultrasonic Waves},
publisher = {IntechOpen},
address = {Rijeka},
year = {2012},
editor = {Auteliano Antunes dos Santos Júnior},
chapter = {9},
doi = {10.5772/30215},
url = {https://doi.org/10.5772/30215}
}