E. R. Komorzynski, Die Trompete als Signalinstrament im altägyptischen Heer, Arch. f. ägypt. Arch., Wien 1938, 1, 7
Khongsai1 and ManiBabu 2021:, Lalginthang Khongsai1 and Mayanglambam ManiBabu, The Art of Using Sound: Pengkul (Trumpet) and Its Role in Traditional Kuki Society, The Oriental Anthropologist, 21(2) 375 –394, 2021, online at: https://journals.sagepub.com/doi/pdf/10.1177/0972558X211055386
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