These may be the references you are looking for, including an abstract for
each.

A retrospective review of 800 pregnancies at one family practice revealed
an association between lack of breastfeeding and physical and sexual abuse
of the mother and/or her children. This anecdotal association, has not been
previously reported, is worth further study using more rigorous methods.
Acheson, L., "Family Violence and Breast-feeding" Arch Fam Med July 1995;
Vol 4,pp 650-652

At two weeks postpartum, breastfeeding mothers had larger total support
scores than non-breastfeeding mothers, as measured by the Utilization of
Support Network Questionnaire (USNQ).  Though not proven by the study,
generally belief is that those with a better support system are less like
to abuse or be abused.  Buckner E, "Support network utilization by
breastfeeding mothers." J Hum Lact 1993 Dec;9(4):231-235

Maurenne Griese, RNC, BSN, CCE, CBE
Manhattan, KS  USA