Citation: Labbe, P; Goreaud, M; Raveau, B (1986). Monophosphate tungsten bronzes with pentagonal tunnels (P O~2~)~4~ (W O~3~)~2m~: Structure of two even-m members P~4~ W~12~ O~44~ (m=6) and P~4~ W~16~ O~56~ (m=8). Journal of Solid State Chemistry, 61, pp. 324-331.