Paper published in Proceedings of National Academy of Sciences (PNAS):

Alme CB, Miao C, Jezek K, Treves A, Moser EI, Moser MB. Place Cells In The Hippocampus: Eleven Maps For Eleven Rooms. PNAS, 2014 111(52):18428-35. If=9.8

How potent is hippocampal spatial memory coding? Extensive experiment across eleven similar rooms describes capacity of hippocampal spatial memory coding through orthogonalisation of spatial representations. Paper free for download here.