Classical and relativistic rocket equations

G’day

It has been twenty years since I derived the rocket equations in class. And I have kept neither textbooks nor notes from that era. Could somebody please remind me of the the classical and relativistic versions of the Rocket Equation (ie. that equation that gives the required ratio of propellant mass to dry mass in a rocket that must achieve a given delta-v using a given exhaust velocity).

Regards,
Agback