Bilal M. (University of Maryland, College Park, USA) Ayyub 
Elicitation of Expert Opinions for Uncertainty and Risks [PDF ebook] 

Experts, despite their importance and value, can be double-edged swords. They can make valuable contributions from their deep base of knowledge, but those contributions may also contain their own biases and pet theories. Therefore, selecting experts, eliciting their opinions, and aggregating their opinions must be performed and handled carefully, w