Characterization of the main colonizer and biogenic pigments present in the red biofilm from La Galea Fortress sandstone by means of microscopic observations and Raman imaging

1. Morillas, H.
2. Maguregui, M.
3. Marcaida, I.
4. Trebolazabala, J.
5. Salcedo, I.
6. Madariaga, J.M.