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Ward M, Johnson SD, Zalucki MP.Ward M, et al. Among authors: johnson sd.Oecologia. 2013 Apr;171(4):883-91. doi: 10.1007/s00442-012-2463-0. Epub 2012 Sep 28.Oecologia. 2013.PMID: 23053225
Ward M, Johnson SD.Ward M, et al. Among authors: johnson sd.Plant Biol (Stuttg). 2013 May;15(3):566-72. doi: 10.1111/j.1438-8677.2012.00700.x. Epub 2012 Nov 22.Plant Biol (Stuttg). 2013.PMID: 23173573
Johnson SD, Torninger E, Agren J.Johnson SD, et al.Biol Lett. 2009 Apr 23;5(2):282-5. doi: 10.1098/rsbl.2008.0702. Epub 2009 Feb 25.Biol Lett. 2009.PMID: 19324662Free PMC article.
Hargreaves AL, Johnson SD, Nol E.Hargreaves AL, et al. Among authors: johnson sd.Oecologia. 2004 Jul;140(2):295-301. doi: 10.1007/s00442-004-1495-5. Epub 2004 May 28.Oecologia. 2004.PMID: 15168105
Hargreaves AL, Harder LD, Johnson SD.Hargreaves AL, et al. Among authors: johnson sd.Ecology. 2010 Jun;91(6):1693-703. doi: 10.1890/09-0792.1.Ecology. 2010.PMID: 20583711