BAP: Lecture  15-16
The notes for lecture 16 are available in
In these lectures, we present a bound on the expected number of
  vertices of the convex hull of n Gaussian random points in the
  plane.
A bound of O(sqrt(log n))
  on this quantity was first obtained by Renyi and Sulanke
  in their papers
-  Uber die convexe hulle von is zufallig gewahlten punkten,
  I and II. Z. Whar. 2, 75-84; 3, 138-148.
  (1963; 1964)
 
We will obtain a weaker result.  But, our proof technique will
  prepare us for the bounds on the sizes of shadows to be obtained
  in the next lectures.