Delacroix, D. L., Meykens, R., & Vaerman, JP. (1982). Influence of Molecular-size of Iga On its Immunoassay By Various Techniques .1. Direct and Reversed Single Radial Immunodiffusion. Molecular Immunology, 19(2), 297-305. https://doi.org/10.1016/0161-5890(82)90343-1 (Original work published 1982)