@article{10_4064_fm180_3_4,
     author = {Joel David Hamkins},
     title = {Extensions with the approximation and cover properties have no new 
large cardinals},
     journal = {Fundamenta Mathematicae},
     pages = {257--277},
     publisher = {mathdoc},
     volume = {180},
     number = {3},
     year = {2003},
     doi = {10.4064/fm180-3-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm180-3-4/}
}