Development and validation of stability indicating HPLC methods for quantitative determination of pravastatin, fluvastatin, atorvastatin and rosuvastatin in pharmaceuticals - Gomes, Fábio Pereira; García, Pedro López; Alves, João Marcel Porto; Singh, Anil Kumar; Kedor-Hackmann, Erika Rosa Maria; Santoro, Maria Inês Rocha Miritello (Analytical Letters, 2009)