J. Otero, J. Bravo-Castillero, R. Guinovart-Diaz, R. Rodriguez-Ramos, and G. Maugin, “Analytical expressions of effective constants for a piezoelectric composite reinforced with square cross-section fibres”, Arch. Mech., vol. 55, no. 4, pp. 357–371, Sep. 2003, Accessed: Jan. 17, 2026. [Online]. Available: http://am.ippt.gov.pl/index.php/am/article/view/v55p357