He usually publishes the result of his studies on the Quarterly Journal of Applied Mathematics and Mechanics (http://www3.oup.co.uk/qjmamj/)
... area of 5.9 km² (2.3 mi²). 5.4 km² (2.1 mi²) of it is land and 0.6 km² (0.2 mi²) of it is water. The total area is 9.61% water. ...