1. Arnott, H. J. (1995). Calcium oxalate in fungi. In S. R. Khan (Ed.), Calcium oxalate in biological systems (pp. 73–111). Boca Raton: CRC Press.
2. Arvaniti, E. C., Lioliou, M. G., Paraskeva, C. A., Payatakes, A. C., Østvold, T., Koutsoukos, P. G., et al. (2010). Calcium oxalate crystallization on concrete heterogeneities. Chemical Engineering Research and Design, 88, 1455–1460.
3. Belen, M., Salgado, J. M., Rodriguez, N., Cortes, S., Converti, A., Dominguez, J. M., et al. (2010). Biotechnological production of citric acid. Brazilian Journal of Microbiology, 41, 862–875.
4. Bohlmann, J. T., Cameselle, C., Nunez, M. J., Lema, J. M., et al. (1998). Oxalic acid production by Aspergillus niger part II: optimization of fermentation with milk whey as carbon source. Bioprocess Engineering, 19, 337–342.
5. Bomstein, R. A., & Johnson, M. J. (1952). The mechanism of formation of citrate and oxalate by Aspergillus niger. The Journal of Biological Chemistry, 198, 143–153.