Nothing is a lot more discouraging that realizing there will have to be a huge literature on a subject ("Cowen’s Law") but currently being unable to locate it mainly because it is named anything fully diverse from envisioned-and quite a few fields have diverse names for the same idea or tool. You can buy any of the material that they have made if it is on sale. ±4 yrs: metadata can be mistaken, publishing conventions can be odd (eg.