Grubb, Gerd <br/><br/>
Spectral asymptotics for the " Soft " selfadjoint extension of a symmetric elliptic differntial operator 
Gerd Grubb 
 - Kobenhavns  Universitet Kobenhavns  1981 
 - 19 p  20 cm 
 - Preprint series  13 .
<br/><br/> Contine bibliografie  Lucrarea este multigrafiata