MacPhail I, Ogilvie W A, Purvis C R
J Int Med Res. 1979;7(5):401-3. doi: 10.1177/030006057900700512.
In a double-blind crossover study in general practice, flurazepam was shown to be significantly better (p less than 0.001) than diazepam in treating sleep disturbance. Fewer patients reported side-effects on flurazepam.