Ensuring economic sustainable development in difficult political and economic conditions is one of the priority tasks for Ukraine. It is forced to reorient the vector of foreign economic cooperation, in particular, the integration formations of the European Union. The aim of the article is to study the development of the processes of regional integration of Ukraine to ensure sustainable economic development, as well as determine the priority direction of its regional integration. The role of Ukraine in the processes of economic integration at the present stage of development is analyzed. Based on the analysis of the current state and development features of the EU and Ukraine, the prospects for the activation of its participation in integration processes, namely entry into the EU, are substantiated. By analysis, the domestic market of Ukraine, the general state of development and its place in the world market are investigated. As a result, the features and barriers of Ukraine's European integration and ways to address them were identified, as well as an attempt was made to identify the main areas of cooperation and ways to improve economic relations between Ukraine and the EU.

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The inflow of foreign direct investment (FDI) is one of the key factors leading to the economic growth and the introduction of high technologies, job creation, advanced training of the workforce. The role of FDI in international competitiveness growth of countries of the Visegrad Group (Poland, Czech Republic, Slovakia, Hungary) is evaluated in the article. Results of the empirical estimations fully confirm the positive impact of FDI inflow on exports growth of all the Visegrad Group countries.  Moreover, the structure of exports of goods has changed; the share of capital-intensive engineering products has grown. At the same time, the level of innovation development of national economies is still comparatively low in the region. The share of medium- and high-tech goods in the structure of national production is below the EU average. That`s why the further growth of the international competitiveness of the Visegrad Group countries as well as the positive impact of FDI on the structure and dynamics of their international trade can only be achieved if the transition to a knowledge-based economy of the countries will be continued, which will lead to the increase in the share of high-tech industries in the national production.

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The article describes the technology for automation of work with sources of information on the Internet. The created technology includes a development of a web service for storing and processing data; creation of a client part for viewing, editing and deleting records from the service; development of a browser extension for instant addition of articles to a web service database. Addition of records to the service is implemented by the development of an extension to Google Chrome browser. Creation of an extension involves getting information about the author of the article, the title of the article, addresses, key expressions, and highlighted text. Regular expressions and recursive search are used to obtain information about the author of the text. The article offers algorithms for finding the name of a literary source and its author. In order to allow the web service to interact with other services or programs, a REST service was developed in the article. A graphical user interface to display and edit records was developed for the web service using the AngularJS JavaScript framework. For the client part, a mechanism of an on request citations search and a mechanism of reference list formation for the selected citations is proposed. For the on request citations search, the article suggests the algorithm of citations ranking. Appropriate plugins for Google Chrome have been developed, which allow to connect content levels, background, and pop-up with each other. Functions for authorization, receiving a token, information search launch, search for an author, and a bibliographic record creation have been created.