E. Duchêne, N. Jaegli, and R. Salber, “Effects of the leaf /fruit ratio during a year N on the bud fertility in the year N+2: results for Pinot noir and Gewurztraminer grapevines (<em>Vitis vinifera</em> L.) in the greenhouse”, OENO One, vol. 37, no. 4, pp. 257–260, Dec. 2003.