Šprajc, Ivan, 2004. The south-of-east skew of Mesoamerican architectural orientations: astronomy and directional symbolism Ivan Šprajc

https://www.academia.edu/6058205/%C5%A0prajc_Ivan_2004_The_south_of_east_skew_of_Mesoamerican_architectural_orientations_astronomy_and_directional_symbolism