A simple HPLC method for simultaneous determination of lopinavir, ritonavir and efavirenz.
Usami Y, Oki T, Nakai M, Sagisaka M, Kaneda T. A simple HPLC method for simultaneous determination of lopinavir, ritonavir and efavirenz. Chem Pharm Bull (Tokyo). 2003 Jun; 51(6):715-8.