Use the Attorneys Involved in the Case
From MN Bench Book - Trial Procedures & Practices for Judges
If the Court determines that it needs some significant legal research or other significant task performed, it is certainly permissible to instruct the attorneys to do the research/task. This can be particularly useful if a unique or novel issue arises at a hearing that has not been briefed to the Court. The Court can instruct the attorneys to do additional research on this new topic and submit memoranda to the Court on the topic.