1. Caltaru M., Petrescu N. // Записки Горного института. 2006. Том 167№ 2. C. 139-142.

1. Caltaru M., Petrescu N. Experimental researches on metals extraction with organic solvents by new methods using liquid membranes // Journal of Mining Institute. 2006. Том 167№ 2. C. 139-142.