Joaquin Pibernat; Juan Martin Hilbert; Cristobal Cebral; Kevin Richards (9 December 1999). "los incas - Monografias.com" (in Spanish). Retrieved 3 February 2011.
openedition.org
journals.openedition.org
https://journals.openedition.org/bifea/2129 (Spanish); "The formal homogeneity that seems to reflect this architectural category is, however, apparent, since rectangular structures of very varied dimensions have been identified as kallankas, in a range that goes from 17 to 105m long", "María de los Ángeles Muñoz (2007: 257) has chosen to define the Kallanka architectural category based on the large dimension of the structures (a minimum of 40m long) and their location within the larger architectural complex (with the windows or doors facing a square)."
