Andreescu, Titu, <br/><br/>
Quadratic diophantine equations / 
Titu Andreescu, Dorin Andrica. 
 - xviii, 211 páginas : 
 - Developments in Mathematics,  40  1389-2177 ; .
<br/><br/> Springer eBooks 
<br/><br/>Why Quadratic Diophantine Equations? -- Continued Fractions, Diophantine Approximation and Quadratic Rings -- Pell's Equation -- General Pell's Equation -- Equations Reducible to Pell's Type Equations -- Diophantine Representations of Some Sequences -- Other Applications. 
<br/><br/><label>ISBN: </label>9780387541099 
<br/><br/><label>LC Class. No.: </label>QA241-247.5