* {{navedi knjigo|zbl= 1043.11027|last= Williams|first= H. C.|authorlink= |chapter= Solving the Pell equation|pages= 325-363|editor1-last= Bennett|editor1-first= M. A.|editor2-last= Berndt|editor2-first= B.Bruce C.|editor2-link= Bruce C. Berndt|editor3-last= Boston|editor3-first= N.Nigel|editor3-link= Nigel Boston|editor4-last= Diamond|editor4-first= H. G.|editor5-last= Hildebrand|editor5-first= A. J.|editor6-last= Philipp|editor6-first= W.|title= Surveys in number theory: Papers from the millennial conference on number theory|location= Natick, MA|publisher= A K Peters|year= 2002|isbn= 1-56881-162-4}}
