@misc{indiciaeeb8b3f51eee7, title = {Gene targeting in embryonic stem cells.}, author = {R Ramírez-Solis and A C Davis and A Bradley}, year = {1993}, doi = {10.1016/0076-6879(93)25054-6}, url = {https://pubmed.ncbi.nlm.nih.gov/8231891/}, note = {Source identifier: 8231891} }