Moradi, S., Madani, S. S., Mahmoudzadeh, G., Zhalechin, M., Khorrami, S. A. (2012). 'Effect of pH on nanocrystalline Co-ferrite prepared using urea and thiourea fuels by combination of sol-gel auto combustion and ultrasonic irradiation methods', International Journal of Nano Dimension, 3(2), pp. 141-147. doi: 10.7508/ijnd.2012.02.007