@article{article, title  = {{The extended narrow line region of NGC 4151 I. Emission line ratios and their implications}},

 url = {{}},

 year = {{1990}},

 month = {{1}},

 author = {{Penston MV and Robinson A and Alloin D and Appenzeller I and Aretxaga I and Axon DJ and Baribaud T and Barthel P and Baum SA and Boisson C and Bruyn AGD et al}},

 volume = {{236}},

 journal = {{Astronomy and Astrophysics}},

 pages = {{53-62}},

 note = {{Accessed on 2024/12/23}}}