To cite package 'occ' in publications use:
Radua J, Bullich S, Lopez N, Catafau AM (2011). “Restricted maximum likelihood estimation of PET neuroreceptor occupancy in the absence of a reference region.” Medical Physics, 38, 2558.
Corresponding BibTeX entry:
@Article{, author = {Joaquim Radua and Santiago Bullich and Natalia Lopez and Ana M Catafau}, title = {Restricted maximum likelihood estimation of PET neuroreceptor occupancy in the absence of a reference region}, journal = {Medical Physics}, year = {2011}, volume = {38}, pages = {2558}, }