Kobayashi, K., Vaerman, J.-P., & Heremans, J. F. (1973). Improved procedure for the isolation of J-chain from human polymeric immunoglobulins. Biochimica et Biophysica Acta : international journal of biochemistry and biophysics, 303(1), 105-117. https://doi.org/10.1016/0005-2795(73)90152-9 (Original work published 1973)