TY  - JOUR
AU  - Danaei, Abolfazi
TI  - Providing a model for superior value proposition with emphasis on developing a unique marketing strategy for the company using of Grounded theory 
JO  - Modiriat-e- farda
VL  - 18
IS  - 60
SP  - 175
EP  - 194
PY  - 2020
DO  - 
ER  -