New Tb 3+--simvastatin optical biosensor for sensitive determination of folic acid, progesterone, testosterone and vitamin D 3 in biological fluids

Ahmed, Amal M; Amin, Tarek A; Youssef, Ahmed O; Amin, Mohammed A; Mohamed, Ekram H; Mahmoud, Safwat A; Abou-Omar, Mona N; Moustafa, Mohamed said attia;