Two-dimensional Picture Grammar models. - K. G. Subramanian 001; M. Geethalakshmi; Atulya K. Nagar; See Keong Lee (EMS, 2008)

Pure 2D Picture Grammars (P2DPG) and P2DPG with Regular Control. - K. G. Subramanian 001; Atulya K. Nagar; M. Geethalakshmi (IWCIA, 2008)

Triangle-tiled Picture Languages. - K. G. Subramanian 001; M. Geethalakshmi; Atulya K. Nagar; See Keong Lee (IWCIA Special Track on Applications, 2009)

Array P System Model with Pure Context-Free Rules. - K. G. Subramanian 001; M. Geethalakshmi; Atulya K. Nagar; See Keong Lee (UKSim, 2009)

Pure 2D picture grammars and languages. - K. G. Subramanian 001; Rosihan M. Ali; M. Geethalakshmi; Atulya K. Nagar (Discret. Appl. Math., 2009)

Picture Array Generation Using Pure 2D Context-Free Grammar Rules. - K. G. Subramanian 001; M. Geethalakshmi; N. Gnanamalar David; Atulya K. Nagar (IWCIA, 2015)