@article{10_4064_fm_101_2_137_149,
     author = {Daniel Simson and Andrzej Skowro\'nski},
     title = {On the category of commutative connected graded {Hopf} algebras over a perfect field},
     journal = {Fundamenta Mathematicae},
     pages = {137--149},
     publisher = {mathdoc},
     volume = {101},
     number = {2},
     year = {1978},
     doi = {10.4064/fm-101-2-137-149},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-101-2-137-149/}
}