V. V. Eremenko, V. A. Sirenko, R. Schleser, and P. L. Gammel, Magnetostriction in the mixed state of superconducting 2H-NbSe₂ single crystals, Low Temp. Phys. 27, (2001) [Fiz. Nizk. Temp. 27, 412-418, (2001)].