@article{Alvarez-Arenas:95097,
      author        = "Alvarez-Arenas, T.E.G. and Sancho-Knapik, D. and
                       Peguero-Pina, J.J. and Gil-Pelegrín, E.",
      title         = "{Surface Density of the Spongy and Palisade Parenchyma
                       Layers of Leaves Extracted From Wideband Ultrasonic
                       Resonance Spectra}",
      year          = "2020",
}