1. http://www.ibtimes.com/android-security-risk-popular-free-vpn-apps-put-users-risk-researchers-find-2481449
2. http://www.ibtimes.co.uk/it-safe-use-free-vpn-shocking-number-android-apps-found-contain-malware-1603034
3. https://www.bleepingcomputer.com/news/security/android-vpn-apps-caught-intercepting-traffic-failing-to-encrypt/
4. http://www.wired.co.uk/article/android-vpn-apps-malware
5. http://www.csoonline.com/article/3161083/security/article.html
6. http://phandroid.com/2017/01/25/android-vpns-are-unsecure/
7. https://mybroadband.co.za/news/security/196034-security-warning-issued-over-android-vpns.html
8. http://thenextweb.com/apps/2017/01/26/avoid-these-10-android-vpn-apps-to-stay-secure-online/
9. https://androidayuda.com/2017/01/25/alertan-sobre-varias-apps-vpn-de-android-por-fallos-de-seguridad/
10. http://www.tuexperto.com/2017/01/26/cuidado-con-las-apps-para-crear-vpn-no-todas-son-seguras/
11. https://www.v3.co.uk/v3-uk/news/3003384/hundreds-of-android-vpn-apps-are-actually-full-of-malware
12. http://www.techspot.com/news/67918-researchers-find-number-android-vpns-security-hazards-reveal.html
13. http://bgr.com/2017/01/25/best-vpn-app-android/
14. http://lifehacker.com/researchers-issue-security-warnings-about-several-popul-1791617644
15. https://torrentfreak.com/researchers-issue-security-warning-over-android-vpn-apps-170125/
16. http://www.universityherald.com/articles/62439/20170126/android-vpn-beware-shady-apps-protect-device.htm
17. http://www.theinquirer.net/inquirer/news/3003354/viruses-and-spyware-found-in-android-vpn-software
18. http://www.itwire.com/security/76583-not-all-android-vpns-protect-user%20s-privacy.html
19. http://t3n.de/news/vpn-apps-fuer-android-unsicher-studie-789392/
20. http://news.fidelityhouse.eu/software-app/attenzione-non-fidatevi-delle-applicazioni-vpn-per-android-256066.html
21. https://www.tuttoandroid.net/news/applicazioni-vpn-sicurezza-pericolose-449993/
22. http://www.securityweek.com/android-vpns-introduce-security-privacy-risks-study
23. https://yro.slashdot.org/story/17/01/25/1317209/viruses-spyware-found-in-alarming-number-of-android-vpn-apps#comments
24. http://wccftech.com/vpn-app-hiding-malware-track-data/
25. http://www.technologydecisions.com.au/content/security/news/many-android-vpn-apps-are-not-secure-csiro-812764730#axzz4Wvw3Kqj3
26. http://www.lifehacker.com.au/2017/01/australian-researchers-issue-security-warnings-about-several-popular-android-vpn-apps/
27. http://www.gizmodo.com.au/2017/01/csiro-most-mobile-vpns-arent-secure/
28. http://www.cso.com.au/article/613258/no-free-lunch-free-android-vpn-apps-csiro-finds/
29. http://olhardigital.uol.com.br/fique_seguro/noticia/lista-mostra-10-apps-de-vpn-para-android-para-evitar/65610
30. http://dicascel.oportaln10.com.br/nunca-baixe-esses-10-apps-de-vpn-no-seu-smartphone-confira-lista-940/
31. http://goandroidapps.com/research-finds-many-android-vpn-apps-unsafe/
32. https://www.version2.dk/artikel/hundredvis-android-vpn-apps-fyldt-med-malware-1072767
33. https://pplware.sapo.pt/smartphones-tablets/android/cuidado-vpns-android-na-sao-parecem/
34. https://www.tekcrispy.com/2017/01/26/cuidado-las-aplicaciones-vpn-gratis-la-play-store-algunas-distribuyen-codigo-malicioso/
35. http://www.techsqrd.com/2017/01/25/%E2%80%8Bvpns-are-not-as-private-as-the-name-suggests-csiro/
36. http://www.startlr.com/experts-spoke-about-the-problems-with-the-vpn-apps-for-android/
37. https://arstechnica.com/security/2017/01/majority-of-android-vpns-cant-be-trusted-to-make-users-more-secure/
38. https://www.hackread.com/malware-in-android-vpn-apps-on-google-play-store/
39. https://www.theregister.co.uk/2017/01/28/vpn_on_android_means_voyeuristic_peeper_network/
40. https://themerkle.com/nearly-4-in-10-android-vpn-apps-contain-malware/
41. http://tech.thaivisa.com/millions-of-users-at-risk-from-shady-android-vpn-apps/19587/
42. http://derstandard.at/2000051717611/Forscher-warnen-Viele-Android-VPN-Apps-gefaehrden-ihre-Nutzer
43. https://www.hardwareluxx.de/index.php/news/consumer-electronics/handys/41759-vpn-apps-fuer-android-sind-teilweise-ein-sicherheitsrisiko.html
44. http://www.itnews.com.au/news/many-android-vpn-enabled-apps-do-not-protect-user-traffic-449132
45. http://tech.firstpost.com/news-analysis/study-finds-that-most-android-vpns-are-not-as-secure-as-they-claim-compromise-on-anonymity-359753.html
46. https://www.eff.org/deeplinks/2017/04/heres-how-protect-your-privacy-your-internet-service-provider