Scala:Monads

http://james-iry.blogspot.rs/2007/09/monads-are-elephants-part-1.html

http://james-iry.blogspot.rs/2007/10/monads-are-elephants-part-2.html

http://james-iry.blogspot.rs/2007/10/monads-are-elephants-part-3.html

http://james-iry.blogspot.rs/2007/11/monads-are-elephants-part-4.html

http://scabl.blogspot.rs/2013/02/monads-in-scala-1.html