المؤلفون: Kellenberger, G., Zichichi, M. L., Weigle, J. J.

المصدر: Proceedings of the National Academy of Sciences of the United States of America, 1961 Jun . 47(6), 869-878.

URL الوصول: https://www.jstor.org/stable/71243

المؤلفون: KELLENBERGER, G., ZICHICHI, M. L., WEIGLE, J.

المصدر: Nature ; volume 187, issue 4732, page 161-162 ; ISSN 0028-0836 1476-4687

الاتاحة: http://dx.doi.org/10.1038/187161a0
http://www.nature.com/articles/187161a0
http://www.nature.com/articles/187161a0.pdf