163 N.W.2d 579 RICHARD H. ABERNATHY, JR., ET AL., APPELLEES, v. CITY OF OMAHA ET AL., APPELLANTS. No. 36978.Supreme Court of Nebraska. Filed December 20, 1968. 1. Estoppel: Municipal Corporations. Ordinarily, the doctrine of equitable estoppel cannot be invoked against a municipal corporation in the exercise of a governmental function, but exceptions can be made […]