A Functional Magnetic Resonance Imaging Study of Overt Letter Verbal Fluency Using a Clustered Acquisition Sequence: Greater Anterior Cingulate Activation with Increased Task Demand. - Cynthia H. Y. Fu; Kevin Morgan; John Suckling; Steven C. R. Williams; Christopher Andrew; Goparlen N. Vythelingum; Philip K. McGuire (NeuroImage, 2002)

Cognitive effects of nicotine in humans: an fMRI study. - Veena Kumari; Jeffrey A. Gray; Dominic H. Ffytche; Martina T. Mitterschiffthaler; Mrigen Das; Elizabeth Zachariah; Goparlen N. Vythelingum; Steven C. R. Williams; Andrew Simmons 001; Tonmoy Sharma (NeuroImage, 2003)