M. I. Sifon,
THE KIRKE CHANNEL AND ITS NAUTICAL CARTOGRAPHY FROM THE 1982 EDITION TO THE NEW EDITION 2019,
The International Hydrographic Review,
Volume 25,
2021,
https://ihr.iho.int/articles/the-kirke-channel-and-its-nautical-cartography-from-the-1982-edition-to-the-new-edition-2019/