I am doing some preliminary research on the subject of evil eye and black magic and I have come across some very good material. But the main deficiency I am encountering is identifying with absolute certainty whether one is afflicted by black magic or evil eye. I even once heard that there are certain rituals or methods one can use to test himself for black magic or evil eye but haven't found anything conclusive yet. If any of the knowledgeable brothers and sisters have any good links, books or lectures that delve into detail about the specific symptoms of black magic and evil eye, your help will be deeply appreciated.