CDF Collaboration Phys. Rev. Lett. 93, 032001 (2004)
Citation check: Okay.

CDF Collaboration Phys. Rev. Lett. 81, 5742 (1998)
Citation check: Okay.

DO Collaboration Phys. Rev. Lett. 94, 071802 (2005)
Citation check: Okay.

CDF Collaboration hep-ex/0502044
Nope, not published.
Submitted to Phys.Rev.Lett.

CDF Collaboration Phys. Rev. D65, 111101 (2002)
Citation check: Okay.