Fukami, T. «Refinement of the Crystal Structure of KH₂PO₄ in the Ferroelectric Phase». Physica status solidi (a), 117, 2, 1990, pàg. K93. DOI: 10.1002/pssa.2211170234.
Ono, Yasuhiro; Hikita, Tomoyuki; Ikeda, Takuro «Phase Transitions in Mixed Crystal System K1-x(NH₄)xH₂PO₄». Journal of the Physics Society Japan, 56, 2, 1987, pàg. 577. DOI: 10.1143/JPSJ.56.577.
Itoh, Kazuyuki; Matsubayashi, Tetsuo; Nakamura, Eiji; Motegi, Hiroshi «X-Ray Study of High-Temperature Phase Transitions in KH₂PO₄». Journal of the Physical Society of Japan, 39, 3, 1975, pàg. 843. DOI: 10.1143/JPSJ.39.843.