1. Blaze, M.: Rights amplification in master-keyed mechanical locks. IEEE Secur. Priv. 99(2), 24–32 (2003)
2. Çelik, S.S.: Lost treasures: locks. Int. J. Sci. Cult. Sport. (IntJSCS) 3(1), 96–112 (2015)
3. Divya, R.S., Mathew, M.: Survey on various door lock access control mechanisms. In: 2017 International Conference on Circuit, Power and Computing Technologies (ICCPCT). IEEE (2017)
4. Jagdale, R., Koli, S., Kadam, S., Gurav, S.: Review on intelligent locker system based on cryptography, wireless and embedded technology. Int. J. Tech. Res. Appl. (Spec. issue 39), 75–77 (2016). e-ISSN 2320–8163
5. Kirthika, B., Prabhu, S., Visalakshi, S.: Android operating system: a review. Int. J. Trend Res. Dev. 2(5), 260–264 (2015). ISSN 2394–9333