Gunjanaporn Tochaikul; Nutthapong Moonkum; Soontaree Sriwongta; Monchuporn Neamchumnan; Aksarapak Thawornnittayakul; Nuttapong Danthanavat. Determination of appropriate proportional in-house flexible radiation shielding material using bismuth powder and natural-silicon rubber compounds. JCST 2021, 11, 277-286.