There is much variation between major currents and organisations of Rodnovery. For instance, the Association of Sons and Daughters of Ukraine of the Native Ukrainian National Faith (OSIDU RUNVira), one of the churches of Ukrainian Sylenkoism, holds a weekly "Holy Hour of Self-Reflection", in which practitioners read from Sylenko's "Maha Vira", sermons are given, the ancestors are commemorated, and prayers and hymns are given, and the meeting ends with the singing of the national anthem of Ukraine. The rival and near homonymous Association of Sons and Daughters of the Native Ukrainian National Faith (OSID RUNVira), also conducts weekly services, but incorporates a wider selection of sources—such as readings from the pan-Rodnover "Book of Veles" or the poetry of Taras Shevchenko—into the proceedings, and its liturgy is characterised by a more colourful ritual action. The structure of these Syenkoite rites is modelled on those of the Eastern Orthodox Church.