%0 Journal Article
%T Double-Tap in a Beam of Second Order Surfaces
%A Korotkiy, V.A.
%K bi-quadratic curve, beam of conic sections, imaginary
touch, involution, generalized Dandelin theorem.
%J Geometry & Graphics
%D 2014
%N 2
%P 5
%I INFRA-M Academic Publishing LLC.