Frances Perraudin; agencies. Sunda Strait tsunami death toll likely to rise, say Indonesian officials. The Guardian (23 December 2018). ციტატა: „The tsunami is believed to have been caused by the collapse of Anak Krakatau that followed an eruption of the Anak Krakatau volcano. There were no significant seismic tremors to indicate a tsunami was coming.“ ციტირების თარიღი: 23 December 2018.
