Candrawati, N. W., V. Singgih, K. P. Yasa, and I. B. N. Rai. “Pin Point Trachea: A Case Report”. Jurnal Respirasi, vol. 8, no. 1, Jan. 2022, pp. 26-32, doi:10.20473/jr.v8-I.1.2022.26-32.