| PHYSICS | | |
| Hazem Ali Attia | Hydromagnetic transient Couette flow and heat transfer in the presence of exponential decaying pressure gradient with the Hall effect | 5 |
| Hazem Ali Attia | Time varying Hartmann flow with heat transfer of a power-law fluid with uniform suction and injection under constant pressure gradient | 15 |
| Ljubisav Novaković | Space, time, and a new approach to the principle of relativity | 29 |
CHEMISTRY | | |
Ivan Gutman Slavko Radenković | A lower bound for the Estrada index of bipartite molecular graphs | 67 |
Hanumappa B. Walikar Harishchandra S. Ramane Ivan Gutman Sabeena B. Halkarni | On equienergetic graphs and molecular graphs | 73 |
BIOLOGY | | |
Ivana Radojević Dušan Stefanović Ljiljana Čomić Nikola Nikolić | Database - Serbian lakes and reservoirs “SELAR” | 85 |
Slobodanka Roganović Ljiljana Čomić | Composition and dynamics of the bacterial community in Bovan Reservoir | 91 |
| Snežana Simić | Morphological and ecological characteristics of rare and endangered species Lemanea fluviatilis (Linné) c. Ag. (Lemaneaceae, Rhodophyta) on new localities in Serbia | 97 |
Marija Cvetković Snežana Branković Aca Marković | Zapisi in the vicinity of Kragujevac (Central Serbia) and their significance | 107 |
Svetlana Avramović Dragana Pavlović Snežana Branković | Structure and dynamics of bush woods vegetation in Šumarice (Central Serbia) | 121 |
Veselinka Zečević Desimir Knežević Danica Mićanović | Seed dry matter accumulation of wheat in different maturity stages | 131 |
Desimir Knežević Aleksandra Yurievna-Dragovich Veselinka Zečević Nevena Đukić | Polymorphism of Gli-A1 alleles in winter wheat cultivars (Triticum aestivum L) | 139 |
| Snežana Pešić | Bagous puncticollis Boheman, 1845 – new weevil species (Coleoptera, Curculionidae) for the fauna of Serbia | 149 |
| Vitko M. Šorić | Taxonomic status of the species of the genus Leuciscus (Pisces, Cyprinidae) from fhe Adriatic and Aegean Basins | 155 |
| Radoslav V. Žikić | IN MEMORIAM - Vojislav Petrović, academician (1925-2007) | 171 |