Mills T, Pratt B C
Arch Virol. 1980;63(2):153-7. doi: 10.1007/BF01320773.
The use of mouse erythrocytes in haemagglutinin titrations allows ectromelia virus haemagglutinin (EHA) to be differentiated from the haemagglutinins produced by other members of the variola/vaccinia subgroup of poxviruses.