"Today, it requires an act of imagination to appreciate the integral role that Oklads Once played in the meaning of medieval icons such as Rublev' s Trinity. To visualize what the majority of early Russian icons must have looked like with their covers intact, we must turn to the private devotional icon of the 18th and 19th centuries, a source that is only now attracting the notice of scholars and collectors."
Salmond, Wendy. "The Art of the Oklad." The Post 3.2 (1996): 5-16. Print.