MOHAMED TAHAR KADAOUI ABBASSI|||g-Natural metrics on unit tangent sphere bundles via a Musso-Tricerri process|||239-247||| WENCHANG CHU – CHENYING WANG|||Trigonometric approach to convolution formulae of Bernoulli and Euler numbers|||249-274||| R. MICHAEL RANGE|||Some landmarks in the history of the tangential Cauchy Riemann equations|||275-283||| PHILIPP ROSTALSKI – BERND STURMFELS|||Dualities in convex algebraic geometry|||285-327||| GABRIELLA ZECCA|||Regularity results for planar quasilinear equations|||329-343|||