:Who needs a reference if you can use comon sense: Its ridiculously stupid to believe that a certain sequence of verbal sounds (and not its volume or its meaning without intonation) can cause physical effects while others, that sound very similar, dont!  
 :Try the following test: Talk to a pet, or someone who does not unserstand the words of your language at all, any baby would do, or invent a language yourself. Now Talk to your subject in a very nice and caring way and say something like:"I am going to rape you and than I will kill you slowly and painfully because I hate you fucking asshole.". Than insult the subject like you are swearing a thread by saying something like:"I love you so much!". Note the emotional and physical reactions of the test subject, that simply does not understand the words you use even though they have a meaning for you (that you just set by how you spoke, not what you spoke). 
 :Its the message that is the message, the language is just a package, a transport medium. And of course messages that are used more often are stored in other parts of your brain, no matter what sequence of sounds or letters are linked to it.