Antigen-initiated B lymphocyte differentiation. XVI. Primary and secondary adoptive responses involve two sequential stages, antigen nonspecific then antigen specific, in the generation of specific AFC.
Shortman K, Howard M, Teale J, Baker J. Antigen-initiated B lymphocyte differentiation. XVI. Primary and secondary adoptive responses involve two sequential stages, antigen nonspecific then antigen specific, in the generation of specific AFC. J Immunol. 1979 Jun; 122(6):2465-72.