**MATHEMATICS**
| | |

Sever Dragomir | A characterization of reflexivity and strict convexity | 7 |

Dragić Banković | General solutions in Boolean algebras B and B_{2} | 13 |

Shri Dhar Bajpai | A new two-dimensional series expansion of Fox's H-function involving Bessel functions and exponential functions | 17 |

Miroslav M. Petrović Ivan Gutman Mirko Lepović | Graphs with three independent edges | 25 |

Nikola Rosić Miroslav Vučković | Double transformations and their application to the solution of homogenous second-order differential equations with variable coefficients | 39 |

Vladimir R. Rosenfeld Ivan Gutman | On the graph polynomials of a weighted graph | 49 |

**PHYSICS** | | |

Branislav Čabrić Ljubo Ristovski Dragan Todorović | Localized excitation in a linear polymer chain with point defect | 59 |

Vukota Babović | On the optimal use of astronomical ephemeris in Roemer's method of measuring the speed of light | 73 |

Vladimir P. Krainov Vladimir N. Ristić | Kinetic energy distribution in tunnel ionization of atoms and ions by strong low-frequency electromagnetic field | 81 |

Svetislav Savović Stevan Jokić Žarko Todorović | Application of Fokker-Planck equation on (15MeV/N) ^{238}U+Ag system with 5-fragments in exit reaction channel | 87 |

**CHEMISTRY** | | |

Sven J. Cyvin | Enumeration and classification of coronoid hydrocarbons. Part XII: circular coronoids | 95 |

Jiri Pospichal Vladimir Kvasička Ivan Gutman | Chemical distance for molecules whose classical formula is not unique | 105 |

Svetlana Marković | Proof of an equality for benzenoid systems | 127 |

**BIOLOGY** | | |

Milić Matović Dragica Obratov | A supplement to the diagnosis of *Pancicia serbica* Vis. (Apiaceae, Araliales) | 139 |

Radoslav V. Žikić Andraš Štajn Branka Miladinov | The effect of insecticide fenitrothion on the growth of body mass and somatic index in rats | 149 |