The easiest way to locate cases is to consult the alimony sections of your state's annotated code. Following the text of the statutes you will find a select list of cases that have applied or examined the statutes.
Westlaw and West Digest Topics and Key Numbers:
Some potentially relevant topics and key numbers follow but other West topics may also deal with family law related issues.
Child Custody (#76D)
Child Support (#76E)
Divorce (#134)
Marriage (#253)