http://www.monasterovirtuale.it/index.php?option=com_content&view=article&id=630&Itemid=603
lorenzo-scupoli-il-combattimento-spirituale PDF
http://www.catholictradition.org/Classics/combat.htm
http://www.copiosa.org/spirituality/spiritual_combat.htm
http://en.wikipedia.org/wiki/Lorenzo_Scupoli
https://archive.org/details/LorenzoScupoli-TheSpiritualCombatThePeaceOfTheSoulTheHappinessOf
