TY  JOUR
TI  Constructing method related to technical drawing of sphere surface with overlay of sphere’s own and falling shadows
KW  technical drawing
KW  surface area
KW  axonometric projection,
secondary projection
KW  ellipse.
JO  Geometry & Graphics
AU  Nikiforov, V..
AU  Maltseva, E..
PY  2013
IS  1
PB  INFRA-M Academic Publishing LLC.