Hansen, Johan P <br/><br/>
Doube points of projections  a geometric proff of the composition theorem 
Johan P. Hansen, Simon Vyrdal 
 - Aarhus  Universitet Aarhus  1984 
 - 8 p  20 cm 
 - Preprint series  10 .
<br/><br/> Lucrarea este multigrafiata  Contine bibliografie