Grant McKinnon, a poster dealer in San Francisco, explains that in the rock'n'roll field, many of the original artists, printers and negatives are still around, so primary-source knowledge is fairly easy to come by.

ECONOMIST: Print graphics

Perennial Portuguese powerhouse Porto relies heavily on the practice, according to a recent paper by sports lawyers Daniel Geey of Field Fisher Waterhouse and Ariel N.

WSJ: Third-Party Ownership: How to Stud a Soccer Player

In this scenario, the U.N. mission would move its personnel from the field back to Damascus, where it would focus on pushing forward the six-point plan to the Syrian government and the opposition.

CNN: U.N. head outlines options for Syria mission