@article{10_4064_fm_123_1_29_37,
     author = {Yukinobu Yajima},
     title = {On {\ensuremath{\Sigma}-products} of {\ensuremath{\Sigma}-spaces}},
     journal = {Fundamenta Mathematicae},
     pages = {29--37},
     publisher = {mathdoc},
     volume = {123},
     number = {1},
     year = {1984},
     doi = {10.4064/fm-123-1-29-37},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-123-1-29-37/}
}