@article {bac2008,
	title = {Relative versions of theorems of Bogomolov and Sukhanov over perfect fields},
	journal = {Proc. Japan Acad. Ser. A Math. Sci.},
	volume = {84},
	number = {7},
	year = {2008},
	month = {07},
	pages = {101{\textendash}106},
	publisher = {The Japan Academy},
	doi = {10.3792/pjaa.84.101},
	url = {http://dx.doi.org/10.3792/pjaa.84.101},
	author = {Bac, Dao Phuong and Thang, Nguyen Quoc}
}
