Rook and Pawn vs Bishop

Recently I saw this interesting position from the game Romanishin-Lewtak 2014. White gained an exchange in the mid-game. Then White won Black's pawn and the game went to the R+p vs B endgame. That looks trivial, but it is not an easy win. White didn't succeed to gain a point in this game. It takes at least 30 moves to outmaneuvre Black. The endgame is of a very high practical value.