Neb. Rev. Stat. § 76-832

The principles of law and equity, including the law of corporations and unincorporated associations, the law of real property and the law relative to capacity to contract, principal and agent, eminent domain, estoppel, fraud, misrepresentation, duress, coercion, mistake, receivership, substantial performance, or other validating or invalidating cause supplement the provisions of sections 76-825 to 76-894 , except to the extent inconsistent with sections 76-825 to 76-894 .