Innentitelbild: Bis(Cyclic Alkyl Amino Carbene) Ruthenium Complexes: A Versatile, Highly Efficient Tool for Olefin Metathesis (Angew. Chem. 4/2017). (4th January 2017) - Gawin, Rafał; Kozakiewicz, Anna; Guńka, Piotr A.; Dąbrowski, Paweł; Skowerski, Krzysztof