Neutron diffractometry investigation of the tricritical point of KH2 PO4 P. Bastie, M. Vallade, C. Vettier, C.M.E. Zeyen et H. MeisterJ. Phys. France, 42 3 (1981) 445-458DOI: https://doi.org/10.1051/jphys:01981004203044500