Nelson-Rees W A, Daniels D W, Flandermeyer R R
Arch Virol. 1981;67(1):101-4. doi: 10.1007/BF01314608.
Two cultures of cells designated HEL-R66, presumable of human origin, revealed monkey instead of human cell characteristics, including chromosomes, isoenzyme mobility pattern and species-specific cell membrane antigen.