Argan, P., Audit, G., Bloch, A., De Botton, N., Faure, J. L., Schuhl, C., Tamas, G., Tzara, C., Vincent, E., Van Oystaeyen, B., Deutsch, J., Favart, D., & Prieels, R. (1980). π+ photoproduction near threshold on 12C. Physical Review C, Nuclear Physics, 21, 662-663. https://doi.org/10.1103/PhysRevC.21.662 (Original work published 1980)