General dictionaries do not seem to know the term, yet the following academic and other works use it:
Abdollah Payrow Shabani, Habermas’ Between Facts and Norms: Legitimizing Power?: http://www.bu.edu/wcp/Papers/Poli/PoliShab.htm
: "Legitimate law-making itself is generated through a procedure of public opinion and will-formation that produces communicative power."
Alinta Thornton, Does internet create democracy?: http://www.zip.com.au/~athornto/thesis2.htm
: "Lack of will formation
Plebiscites, opinion management and public opinion research do not offer potential for democracy, because they do not provide the opportunity for discursive will formation. "
Melissa Yates, Review of: Habermas, Kristeva, and Citizenship by Noëlle McAfee
Cornell University Press, Ithaca, 2000: http://www.politicalreviewnet.com/polrev/revi...
: "McAfee has paved the way for a conception of what it means for coercive law to be legitimate distinct from processes of autonomous will-formation."
"In adopting Habermas's account of political agency, she would also need to address his interest in accounting for legitimate political will-formation."
Stacy Smith, Democracy, Plurality, and Education: Deliberating Practices of and for Civic Participation: http://www.ed.uiuc.edu/eps/PES-Yearbook/97_do...
: "will address each of these conditions in turn by discussing the role of generalizable interests, formal versus substantive equality, and will-formation within discourse theory and its "ideal deliberative procedure."
Wikipedia: Between Facts and Norms: http://en.wikipedia.org/wiki/Between_Facts_an...
: "Pointing out that legitimate law-making is itself generated through a procedure of public opinion and will-formation that produces communicative power, he asserts that this communicative power, in its turn, influences the process of social institutionalization."