189-203 | Oscillatory and non oscillatory criteria for the systems of two linear first order two by two dimensional matrix ordinary differential equations. Grigorian, Gevorg Avagovich |
205-226 | Two-spinor tetrad and Lie derivatives of Einstein-Cartan-Dirac fields. Canarutto, Daniel |
227-237 | Metrically regular square of metrically regular bipartite graphs of diameter $D = 7$. Vetchý, Vladimír |
239-254 | Natural operations on holomorphic forms. Navarro, A.; Navarro, J.; Tejero Prieto, C. |