TY  JOUR
TI  Double-Tap in a Beam of Second Order Surfaces
KW  bi-quadratic curve
KW  beam of conic sections
KW  imaginary
touch
KW  involution
KW  generalized Dandelin theorem.
JO  Geometry & Graphics
AU  Korotkiy, V.A.
PY  2014
IS  2
PB  INFRA-M Academic Publishing LLC.