Rooks belong behind passed pawns

It was Dr Tarrasch who formulated this famous principle and though there are, of course, exceptions and positions in which the rook is better placed on the side of the pawn, in rook endings this is still a very good rule of thumb.

rules - Can the pawn take the rook in this position? - Chess Stack Exchange

CSCA Informant – Positional Analysis and Efficient Study – Chess Academy of Denver

What's the difference between a rook in front of vs. behind enemy passed pawns in an endgame? : r/chessbeginners

Chess Tips - ShafiqChess Academy

Chess Middle Game Guide, PDF, Chess Openings

CSCA Informant – Positional Analysis and Efficient Study – Chess Academy of Denver

CSCA Informant – Positional Analysis and Efficient Study – Chess Academy of Denver

Starting Out: Rook Endgames by Ward, Chris

What are some strategies in rook endgames (for ex. rook behind the passed pawn)? - Quora