Chaiyasan, Patcharaporn, et al. “First Report on Nucleolar Organizer Regions (NORs) Polymorphism and Constitutive Heterochromatin of Moonlight Gourami, Trichopodus Microlepis (Perciformes, Osphronemidae)”. Caryologia, vol. 74, no. 2, Oct. 2021, pp. 111-9, doi:10.36253/caryologia-775.