@article{10_4064_fm207_1_2,
     author = {C. T. Chong and Wei Wang and Liang Yu},
     title = {The strength of the projective {Martin} conjecture},
     journal = {Fundamenta Mathematicae},
     pages = {21--27},
     publisher = {mathdoc},
     volume = {207},
     number = {1},
     year = {2010},
     doi = {10.4064/fm207-1-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm207-1-2/}
}