The site is listed by the Corpus of Maya Hieroglyphic Inscriptions as a location in which inscriptions were discovered (2012; 2016), yet the Text Database and Dictionary of Classic Mayan project does not have any published or written reports on it. This information remains to be verified. Mathews locates Altamira (ALT) in Chiapas (Mathews 2005).
Corpus of Maya Hieroglyphic Inscriptions (CMHI)
2012 Site Codes (updated July 2012). http://peabody.harvard.edu/files/cmhi/CMHI_SiteCodes_FINAL_2012_forWeb.pdf (by Barbara Fash). (accessed July 23, 2015)
2016 Site Codes (updated Februar 2016). https://www.peabody.harvard.edu/files/cmhi/CMHI_SiteCodes_FINAL_2016.pdf (by Barbara Fash). (accessed December 18, 2016)
2005 Site Names and Codes. Foundation for the Advancement of Mesoamerican Studies (FAMSI) http://research.famsi.org/whos_who/sitenames_codes.htm (accessed July 23, 2015)
2004 Abkürzungen für Maya-Ruinenorte mit Inschriften. Wayeb Notes 8. http://www.wayeb.org/notes/wayeb_notes0008.pdf (accessed July 23, 2015)