Caltaru M., Petrescu N., Vasiliu C. // Записки Горного института. 2006. Т. № 2 167. С. 135-138.

Caltaru M., Petrescu N., Vasiliu C. Copper extraction from diluted solutions using hollow fiber supported liquid membranes // Journal of Mining Institute. 2006. Vol. № 2 167. p. 135-138.