“Summer Applications of Plant Growth Regulators, Ethephon And 1-Naphthaleneacetic Acid, Do Not Promote Return Bloom or Reduce Biennial Bearing in Seven High-Tannin Cider Apple Cultivars” (2023) Journal of the American Pomological Society, 77(2), pp. 75–92. doi:10.71318/apom.2023.77.2.75.