Corrigendum to "Modeling on oxygen chemisorption-induced noise in metallic oxide gas sensors" (Sensors and Actuators B: Chemical 107 (2) 2005, 722-729) and to "Adsorption-desorption noise in gas sensors: Modelling using Langmuir and Wolkenstein models for adsorption" (Sensors and Actuators B: Chemical, in press (corrected proof,