A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding
From: Andrés Ruiz
Date: 2017 Apr 7, 11:30 +0200
Marco, maybe you're looking for this:
Van Allen, J. A., An Analytical Solution of the Two Star Sight Problem of Celestial Navigation, NAVIGATION, Journal of The Institute of Navigation, Vol. 28, No. 1, Spring 1981, pp. 40-43.