Patra P., Seesala V. S., Soni S. R., Roy R. K., Dhara S. , Ghosh A. , Patra N. , Pal S, Biopolymeric pH-responsive fluorescent gel for in-vitro and in-vivo colon specific delivery of metronidazole and ciprofloxacin, European Polymer J., 114, 255-264, 2019