1. AZOCOUPLING PRODUCTS. PART IV. THE STRUCTURE OF DYES OBTAINED BY AZO-COUPLING REACTION OF 1-(4-HYDROXY-6-METHYLPYRIMIDIN-2-YL)-3-METHYLPYRAZOLIN-5-ONE WITH AROMATIC DIAZONIUM SALTS. Authors: IOAN PANEA, ADINA GHIRIȘAN, I. BALDEA, IOAN SILAGHI-DUMITRESCU, LILIANA CRĂCIUN, IOAN ALEXANDRU SILBERG.2. HEATS OF FORMATION OF MEDIUM-RING STRAINED CYCLO- AND POLYCYCLOALKANES: COMPARISON OF AB INITIO GROUP EQUIVALENT SCHEMES WITH THE PM3 AND MMX METHODS. Authors: LILIANA CRĂCIUN, JAMES E. JACKSON.