Withdrawal notice to: “Methane sensors based on ZnGa2O4 ceramics with addition of Er for combustion monitoring systems” [Opt. Mater. X 26C 100409] - Аleksei V. Almaev; Zhakyp T. Karipbayev; Ernar B. Zhurkin; Nikita N. Yakovlev; Olzhas I. Kukenov; Alexandr O. Korchemagin; Gulzhanat A. Akmetova-Abdik; Kuat K. Kumarbekov; Amangeldy M. Zhunusbekov; Leonid A. Mochalov; Ekaterina A. Slapovskaya; Anatoli I. Popov (Optical Materials: X)