Relativistic Deuteron Structure Function
  We calculate the unpolarised deep inelastic structure function of a relativistic deuteron within a covariant framework. An exact treatment of nucleon off-shell effects is shown to give corrections to the widely-used convolution model, even in impulse approximation. Neglecting off-shell effects in the extraction of the neutron structure function from deuterium data introduces errors of order $1-2\%$. 
W.Melnitchouk (U. Regensburg), A.W.Schreiber (PSI) and A.W.Thomas (U.   Adelaide)