Garfein, R. S.; Golub, E. T.; Greenberg, A. E.; Hagan, H; Hanson, D. L.; Hudson, S. M.; et al. (септембар 2007). „A peer-education intervention to reduce injection risk behaviors for HIV and hepatitis C virus infection in young injection drug users.”. Aids. 21 (14): 1923—32. PMID17721100. doi:10.1097/QAD.0b013e32823f9066.CS1 одржавање: Формат датума (веза)
Shultz HA. (2001). „Department of defense doctrine and material forprotecting personnel from biting arthropods”. J Trav Med. 8 (3): 133—8. PMID11468115. doi:10.2310/7060.2001.24450..
Garfein, R. S.; Golub, E. T.; Greenberg, A. E.; Hagan, H; Hanson, D. L.; Hudson, S. M.; et al. (септембар 2007). „A peer-education intervention to reduce injection risk behaviors for HIV and hepatitis C virus infection in young injection drug users.”. Aids. 21 (14): 1923—32. PMID17721100. doi:10.1097/QAD.0b013e32823f9066.CS1 одржавање: Формат датума (веза)
Shultz HA. (2001). „Department of defense doctrine and material forprotecting personnel from biting arthropods”. J Trav Med. 8 (3): 133—8. PMID11468115. doi:10.2310/7060.2001.24450..