The Preparation and Properties of Heteroarylazulenes and Hetero-Fused Azulenes Taku Shoji and Shunji Ito Recent Developments in the Chemistry of Pyrazoles Andrew W. Brown Recent Developments in the Chemistry of 1, 2, 3-Thiadiazoles Yuri Shafran, Tatiana Glukhareva, Wim Dehaen and Vasiliy Bakulev The Literature of Heterocyclic Chemistry, Part XVI, 2016 Leonid I. Belen'kii and Yulia B. Evdokimenkova