Coben, Lawrence S. <br/><br/>
Some roads do lead to Incallajta :   the inca double road from Vacas. 

 - California-XXU :   Institute of Andean Studies,   2010. 
 - p. 53-63:   il. 
 - Irregular 
 - vol. 30, no. 1(Jun. 2010) 
 - Ñawpa pacha. Journal  of Andean Archaeology ;   vol. 30, no. 1 .
 - Estados Unidos .   Institute of Andean Studies,. .
<br/><br/><br/>Inglés.