Gemcitabine and betulinic acid co-encapsulated PLGA−PEG polymer nanoparticles for improved efficacy of cancer chemotherapy. - Saneja, Ankit; Kumar, Robin; Mintoo, Mubashir J.; Dubey, Ravindra Dhar; Sangwan, Payare Lal; Mondhe, Dilip M.; Panda, Amulya K.; Gupta, Prem N. (Materials Science & Engineering: C, 2019)