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Robert William Cruden, Ann Marie McClain, Gokaran P. Shrivastava, Pollination Biology and Breeding System of Alliaria petiolata (Brassicaceae), Bulletin of the Torrey Botanical Club, Vol. 123, No. 4 (Oct. - Dec., 1996), pp. 273-280
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Cruden et al. (1996) studied this question.
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