"Agreement between Government of Brunei and the Government of Sarawak relating to the Pandaruan River and District signed by G.E. Cator (British Resident Burneit) and H.S.B. Johnson (Resident Fifth Division, Sarawak) dated the 4th of February, 1920 covering a distance of 78.0km," quoted inAhmad Fauzi, Nordin (2006). "Land and River Boundary Demarcation and Maintenance – Malaysia's Experience"(PDF). Working paper at International Symposium on Land and River Demarcation and Maintenance in Support of Borderland Development. Retrieved 11 April 2008.