@article{10_4064_fm_140_2_183_189,
     author = {R. Barua and V. Srivatsa},
     title = {Definable hereditary families in the projective hierarchy},
     journal = {Fundamenta Mathematicae},
     pages = {183--189},
     publisher = {mathdoc},
     volume = {140},
     number = {2},
     year = {1991},
     doi = {10.4064/fm-140-2-183-189},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-140-2-183-189/}
}