Berg, Christian <br/><br/>
J. Liouvilles unpublished work on an integral operator in potential theory. A historical and mathematical analysis 
Christian Berg, Jesper Lutzen 
 - Kobenhavns  Kobenhavns Universitet matematisk institut  1988 
 - 39 p  20 cm 
 - Preprint  33 .
<br/><br/> Cartea este multigrafiata  Cuprinde bibliogr