ZUCKERMAN, J. N. The importance of injecting vaccines into muscle; Different patients need different needle sizes. S. 1237–1238. BMJ [online]. 2000-11-18. Roč. 321, čís. 7271, s. 1237–1238. Dostupné online. doi:10.1136/bmj.321.7271.1237. PMID11082069. (anglicky)
ZUCKERMAN, J. N. The importance of injecting vaccines into muscle; Different patients need different needle sizes. S. 1237–1238. BMJ [online]. 2000-11-18. Roč. 321, čís. 7271, s. 1237–1238. Dostupné online. doi:10.1136/bmj.321.7271.1237. PMID11082069. (anglicky)