“…Recently, some optimal inequalities for Riemannian maps from Riemannian manifolds onto space forms were established in [12]. Moreover, S ¸ahin introduced any other types of Riemannian maps [20,21,22,23], see also [18,19]. In further studies, in particular Akyol, S ¸ahin and Yanan searched this type submersions [1,2,3,4,31] and Riemannian maps [26,27,32,35] under conformality case, see also [11].…”