Thanh Hoa, Le, et al. “Structure and Characterization of the Ribosomal Transcription Units of Small Liver Flukes, Opisthorchis Viverrini, O. Felineus and Clonorchis Sinensis”. Vietnam Journal of Biotechnology, vol. 17, no. 3, Nov. 2020, pp. 441-7, doi:10.15625/1811-4989/17/3/13538.