Banks, H. T <br/><br/>
Transformation semigroups amd L 1-approximation for structured population models  Preprint 
H. T. Banks, F. Kappel 
 - Graz  Institute fur Mathematik Univ. Graz  1988 
 - 14 p  21 cm 
 - Technische Univ. Graz  128 .
<br/><br/> Cartea este multigrafiata  Contine bibliogr