A. Isaac, V. Barboza, F. Sket, J. R. D'Almeida, L.A. Montoro, A. Hilger, I. Manke. Towards a deeper understanding of structural recalcitrance of biomass using phase-contrast tomography. Biotechnology for Biofuels 8, 1-7, 2015. DOI: 10.1186/s13068-015-0229-8