1. Accessed: 2017. Redis. http://www.redis.io/. Accessed: 2017. Redis. http://www.redis.io/.
2. Accessed: 2018. SQlite zero-malloc allocation system. https://www.sqlite.org/malloc.html. Accessed: 2018. SQlite zero-malloc allocation system. https://www.sqlite.org/malloc.html.
3. Accessed: 2019. Memcached: A high performance distributed memory object caching system. http://memcached.org/. Accessed: 2019. Memcached: A high performance distributed memory object caching system. http://memcached.org/.