he09bmcbioinfo
Ji He, Vagner A. Benedito, Mingyi Wang, Jeremy D. Murray, Patrick X. Zhao, Yuhong Tang and Michael K. Udvardi. “The Medicago truncatula gene expression atlas web server”. BMC Bioinformatics. 2009, 10:441
BMC Open Access | PDF (1.1M) | BibTEX (he09bmcbioinfo)
Also check the MtGEA web server.