F.K.Hansen; G. Rodsrun (1991). "Surface tension by pendant drop. A fast standard instrument using computer image analysis". Colloid and Interface Science. 141 (1): 1–12. Bibcode:1991JCIS..141....1H. doi:10.1016/0021-9797(91)90296-K.
F.K.Hansen; G. Rodsrun (1991). "Surface tension by pendant drop. A fast standard instrument using computer image analysis". Colloid and Interface Science. 141 (1): 1–12. Bibcode:1991JCIS..141....1H. doi:10.1016/0021-9797(91)90296-K.