Comment on “Sap flow measurements by a single thermal dissipation probe: exploring the transient regime” — Ann. For. Sci. 66 (2009) by Mahjoub et al. and “Sap flow measurement by a single thermal dissipation probe in transient regime: implementation of the method and test under field conditions” — Ann. For. Sci. 1-9 (2012) by Masmoudi et al. |