Combinatorics on words:  Christoffel words and repetitions in words/ 
Jean Berstel ... [et al.]. 
 - Providence, R.I.:  American Mathematical Society,  c2009. 
 - xii, 147 p.:  ill.;  26 cm. 
 - CRM monograph series;  v. 27 .
 - CRM monograph series;  v. 27. .
<br/><br/>Includes bibliographical references (p. 135-141) and index. 
<br/><br/><label>ISBN: </label>9780821844809 (alk. paper) 0821844806 (alk. paper) 
<br/><br/><label>LCCN: </label>2008036669 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Combinatorial analysis.<br/>Word problems (Mathematics)
<br/><br/><label>Dewey Class. No.: </label>511.6  / C731