The present paper tracks the attitudes of the Bulgarian students towards online education provided by the universities during the quarantine period due to the pandemic situation caused by COVID-19. The study presents data and analysis of results from an empirical survey conducted in April 2020 among students in different stages of their tertiary education in Bachelor Degree. Our findings show that students define online lectures with the same quality as traditional lectures in auditoriums. In terms of intensity there is no clear expressed opinion of responders with slight predominance of people who claim that the intensity of online learning is less than the traditional lecture. Major part of responded students claims that they manage to focus better in online lecture. Students are convinced that in online environment they work easier in individual tasks, but not in team works.

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Restricted measures for social isolation taken as precautions in the fight against pandemic due to the COVID-19 virus, have changed dramatically the normal business and professional life. Companies in all sectors have to be adaptive and flexible in order to survive in this complex and hardly unpredictable business environment. At first glance ICT sector is not so severely and visibly affected by the COVID-19 economic crisis. Due to numerous reasons companies from the sector have so far shown an enviable level of flexibility and adaptability to the rapid changes in business environment conditions. As a response to the anti-epidemiological requirements, most often used tool from ICT companies is to transform working processes from office to home, following the line of social isolation. In this regard the major objective of the current article is to reveal the specifics of home office work in ICT companies and its impact on the employees' motivation in terms of their perceptions and level of commitment to the achievement of companies` goals. For this purpose we used questionnaire survey among employees working in different job positions in ICT companies in Bulgaria (n=158). Our findings reveal that majority of employees (almost 80% of responders) have positive attitude to the home office as a working measure in social isolation conditions. On the other hand, home office does not significantly impact on the level of employees` motivation and their engagement to the achievement of the company's goals. Based on analysis of collected data, we propose divers measures for improving the employees satisfaction and motivation in specific context of home office work during stress crisis situation, such the pandemic is.

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The concept of competitive advantage is central for the strategic management literature.The researchers` ideas in this field are broad and comprehensive -from an attempts to define and measure the advantage, through its sources, to the complex of conditions that presuppose its existence at all, and its preservation for a longer period. The activities to protect it in a highly dynamic environment are a great challenge. This makes the topic of the necessary and sufficient requirements that the sources of competitive advantage have to meet in order to ensure its sustainability. Studying the conditions needs the sustainability to be defined, and with respect to the requirements of dynamism coming from the outside environment. The purpose of this article is to study, systematize and summarize existing scientific opinions about the conditions that ensure the sustainability for the competitive advantage and to identify the reasons for moving to its flexibility. In order to achieve this objective, it is necessary to fulfil the following tasks: -to consider the prerequisites for sustainability and to derive a definition of "sustainable competitive advantage"; -to highlight the specific features of the transitional competitive advantages; -to indicate the implementation of the two concepts in business organizations.