Tekirian, T., Cole, G., Russell, M., Yang, F., Wekstein, D., Patel, E., … Geddes, J. (1969). Carboxy terminal of beta-amyloid deposits in aged human, canine, and polar bear brains. Neurobiology of Aging, 17(2), 249-57. https://doi.org/10.1016/0197-4580(95)02062-4 (Original work published 1969)