Lape, Peter V.; O’Connor, Sue; Burningham, Nick (31 January 2007). "Rock Art: A Potential Source of Information about Past Maritime Technology in the South-East Asia-Pacific Region: P. V. LAPE ET AL.: ROCK ART OF THE SOUTH-EAST ASIA-PACIFIC REGION". International Journal of Nautical Archaeology. 36 (2): 238–253. doi:10.1111/j.1095-9270.2006.00135.x. S2CID28293144.
Lape, Peter V.; O’Connor, Sue; Burningham, Nick (31 January 2007). "Rock Art: A Potential Source of Information about Past Maritime Technology in the South-East Asia-Pacific Region: P. V. LAPE ET AL.: ROCK ART OF THE SOUTH-EAST ASIA-PACIFIC REGION". International Journal of Nautical Archaeology. 36 (2): 238–253. doi:10.1111/j.1095-9270.2006.00135.x. S2CID28293144.