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We enter the details of two recent articles concerning as many chemotaxis models, one nonlinear and the other linear, and both with produced chemoattractant and saturated chemorepellent. More precisely, we are referring respectively to the papers “Boundedness in a nonlinear attraction‐repulsion Keller–Segel system with production and consumption,” by S. Frassu, C. van der Mee and G. Viglialoro [J. Math. Anal. Appl....