Shi, Youwei. 1999. `bēi‘ yīn shuō yí \zh{“背”音说疑} [Interrogations about the pingsheng reading of the character \zh{背}]. Hànyǔ xuéxí \zh{汉语学习} 5. 45-46.
@article{jacquesestimative-shiyw99bei,
author = {Shi, Youwei},
journal = {Hànyǔ xuéxí \zh{汉语学习}},
pages = {45-46},
title = {`bēi‘ yīn shuō yí \zh{“背”音说疑} [Interrogations about the pingsheng reading of the character \zh{背}]},
volume = {5},
year = {1999}
}