@book {8584,
	title = {Amaranthus tamariscinus Nutt. and Amaranthus palmeri S. Watson in Romania},
	year = {1997},
	month = {1997///},
	pages = {121 - 125},
	publisher = {Acta Horti Buc. 1995-1996},
	organization = {Acta Horti Buc. 1995-1996},
	author = {M. Costea}
}
@book {8585,
	title = {The genus Amaranthus L. section Amaranthus in Romania},
	year = {1997},
	month = {1997///},
	pages = {105 - 120},
	publisher = {Acta Horti Buc. 1995-1996},
	organization = {Acta Horti Buc. 1995-1996},
	author = {M. Costea}
}
@article {8236,
	title = {Amaranthus L. subgenus Albersia (Kunth) Gren. \& Godr. in Romania},
	journal = {Rev. Rom. Biol},
	volume = {43},
	year = {1998},
	month = {1998///},
	pages = {95 - 112},
	author = {M. Costea}
}
@article {8245,
	title = {Conspectus and notes on the genus Amaranthus in Canada},
	journal = {Rhodora},
	volume = {105},
	year = {2003},
	month = {2003///},
	pages = {260 - 281},
	author = {M. Costea and F.J. Tardif}
}
@article {8276,
	title = {Notes on some little known Amaranthus taxa (Amaranthaceae) in the United States},
	journal = {Sida},
	volume = {19},
	year = {2001},
	month = {2001///},
	pages = {975 - 992},
	author = {M. Costea and A. Sanders and G. Waines}
}
@article {8277,
	title = {Preliminary results towards a revision of the Amaranthus hybridus species complex (Amaranthaceae)},
	journal = {Sida},
	volume = {19},
	year = {2001},
	month = {2001///},
	pages = {931 - 974},
	author = {M. Costea and A. Sanders and G. Waines}
}
@article {8278,
	title = {Taxonomy of the most common weedy European Echinochloa species (Poaceae: Panicoideae) with special emphasis on characters of the lemma and caryopsis},
	journal = {Sida},
	volume = {20},
	year = {2002},
	month = {2002///},
	pages = {525 - 548},
	author = {M. Costea and F.J. Tardif}
}
