http://stackoverflow.com/questions/5370482/whats-the-advantage-of-load-vs-get-in-hibernate

http://vladmihalcea.com/2015/04/09/how-does-hibernate-store-second-level-cache-entries/
http://stackoverflow.com/questions/16929618/reloading-objects-from-database-not-cache-after-stored-procedure-updates-datab
http://shahzad-mughal.blogspot.co.uk/2012/04/spring-jpa-hibernate-support-for-custom.html
https://amitstechblog.wordpress.com/2011/05/31/supporting-custom-isolation-levels-with-jpa/
https://forum.hibernate.org/viewtopic.php?p=2387456

WAR's structure
http://java.boot.by/wcd-guide/ch02s04.html
http://docs.oracle.com/javaee/5/tutorial/doc/bnadx.html

Official documentation
https://tomcat.apache.org/tomcat-7.0-doc/appdev/deployment.html
Others
http://www.codejava.net/servers/tomcat/how-to-deploy-a-java-web-application-on-tomcat
http://archive.oreilly.com/pub/a/java/archive/tomcat.html

Link nay chay tot: https://www.digitalocean.com/community/tutorials/how-to-install-apache-tomcat-8-on-ubuntu-14-04
Otherwise, need to adjust JVM for Tomcat: http://wiki.razuna.com/display/ecp/Adjusting+Memory+Settings+for+Tomcat