per Kumar Sarkar, Uttam, Kumar Pathak, Ajey, Kumar Tyagi, Lalit, Mohan Srivastava, Satyendra, Prakash Singh, Shri, Kumar Dubey, Vineet

Institution: Universidad de Costa Rica

Repositorio: Portal de Revistas UCR

per Iqbal Mir, Javaid, Kumar Sarkar, Uttam, Prakash Gusain, Om, Kumar Dwivedi, Arvind

Institution: Universidad Estatal a Distancia

Repositorio: Portal de Revistas UNED

per Iqbal Mir, Javaid, Kumar Sarkar, Uttam, Prakash Gusain, Om, Kumar Dwivedi, Arvind, Jena, Joukrushna

Institution: Universidad de Costa Rica

Repositorio: Portal de Revistas UCR

per Praveen, Agnihotri, Kumar, Sarkar Uttam, Sahebrao, Nagpure Naresh, Mani, Mishra Rahsya, Ravindra, Kumar, Abhishek, Awasthi, Kumar, Pandey Brijesh

Institution: Universidad Estatal a Distancia

Repositorio: Portal de Revistas UNED