MartignoniE, SancesG, NappiGSignificance of hormonal changes in migraine and cluster headache.Gynecol Endocrinol1987, 1: 295–319.
2.
NappiG, SandriniG, GranellaF, RuizL, CeruttiG, BlandiniF, ManzoniGCA new 5-HT2 antagonist (ritanserin) in the treatment of chronic headache with depression. A double-blind study vs amitriptyline.Headache1990, 30: 439–444.