Kuiper, J.G.J. 1975. Zwei neue boreale Pisidium-Arten: P. hinzi and P. waldeni. Archiv für Molluskenkunde 106(1/3): 27-37. Available electronically.
Kuiper, 1975. Arch. Moll. 106(1/3): 27, text figs. 1-6, 28, 30.
Kuiper, 1975. Arch. Moll. 106(1/3): 32, text figs. 13, 15-17, 19-21-26, 30.