Chapter Discussion - Rokushiki is based on Haki, Page 5

Would you rather have a strong Devil Fruit or strong Haki/Rokushiki? - Quora

Which do you prefer in One Piece, Devil Fruit, Haki or Rokushiki? - Quora

Chapter 1018, One Piece Wiki

Rokushiki is based on physical strength is actually based on a mistranslation in earlier One Piece volumes : r/OnePiece

Rokuogan, One Piece Wiki

Completely unrelated but haki seems to give less/no resistance to awakened devil fruit abilities : r/OnePiece

one piece - Haki Hardness Grades? - Anime & Manga Stack Exchange

Rokushiki is based on physical strength is actually based on a mistranslation in earlier One Piece volumes : r/OnePiece

Chapter Discussion - Rokushiki is based on Haki, Page 5

Chapter Discussion - Rokushiki is based on Haki, Page 6

Monkey D. Luffy (Post-Timeskip), VS Battles Wiki

Chapter Discussion - Rokushiki is based on Haki, Page 7