The Role of Air Transport in the Development of International Tourism by Grzegorz Zajac

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Institutional and organisational aspects of security at the airports of the Republic of Poland by Grzegorz Zając

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(Not)enjoyable poetry games under the watchful eye of Adam Naruszewicz by Grzegorz Zając

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Contemporary Aspects of European Transport Policy by Grzegorz Zajac

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Cold cranking viscosity of used synthetic oils originating from vehicles operated under similar driving conditions by Artur Wolak, Grzegorz Zając

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Measuring Kinematic Viscosity of Engine Oils: A Comparison of Data Obtained from Four Different Devices by Artur Wolak, Grzegorz Zając, Tomasz Słowik

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APPLICATION OF THE CSI METHOD TO TEST CONSUMER SATISFACTION: A CASE STUDY OF PETROL STATIONS by Agnieszka DUDZIAK, Monika STOMA, Grzegorz ZAJĄC

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The functioning and perspectives for the development of the Digital Medical Library with particular reference to the Database of Doctoral Theses by Małgorzata Matera, Anna Zbijowska, Grzegorz Zając

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Professional Car Drivers’ Attitudes toward Technical, Marketing and Environmental Characteristics of Engine Oils: A Survey Study by Artur Wolak, Kamil Fijorek, Grzegorz Zając

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FTIR analysis and monitoring of used synthetic oils operated under similar driving conditions by Artur Wolak, Wojciech Krasodomski, Grzegorz Zając

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Heavy metal content in used engine oils depending on engine type and oil change interval by Joanna Szyszlak-Bargłowicz, Grzegorz Zając, Artur Wolak

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Influence of Biomass Incineration Temperature on the Content of Selected Heavy Metals in the Ash Used for Fertilizing Purposes by Grzegorz Zając, Joanna Szyszlak-Bargłowicz, Małgorzata Szczepanik

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Evaluation of Greenhouse Gas Emission Levels during the Combustion of Selected Types of Agricultural Biomass by Jacek Wasilewski, Grzegorz Zając, Joanna Szyszlak-Bargłowicz, Andrzej Kuranc

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Chemical Characteristics of Biomass Ashes by Grzegorz Zając, Joanna Szyszlak-Bargłowicz, Wojciech Gołębiowski, Małgorzata Szczepanik

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Analysis of the Possibility of Management of Curly-Leaf Pondweed for Energetic Purposes by Marcin Herkowiak, Andrzej Osuch, Ewa Osuch, Bogusława Waliszewska, Grzegorz Zając

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Experimental Investigation of the Viscosity Parameters Ranges—Case Study of Engine Oils in the Selected Viscosity Grade by Artur Wolak, Grzegorz Zając, Kamil Fijorek, Piotr Janocha, Arkadiusz Matwijczuk

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Analysis of Changes in Soot Content in Engine Oils under Operating Conditions by Grzegorz Zając, Wojciech Gołębiowski, Małgorzata Szczepanik, Artur Wolak, Marie Sejkorová

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Common Reed and Maize Silage Co-Digestion as a Pathway towards Sustainable Biogas Production by Robert Czubaszek, Agnieszka Wysocka-Czubaszek, Wendelin Wichtmann, Grzegorz Zając, Piotr Banaszuk

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Chemical composition of Lavatera thuringiaca L. biomass ash after pre-sowing stimulation of seeds with He–Ne laser light by Małgorzata Budzeń, Grzegorz Zając, Agnieszka Sujak, Joanna Szyszlak-Bargłowicz, Marcin Kafarski

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Grass from Road Verges as a Substrate for Biogas Production by Robert Czubaszek, Agnieszka Wysocka-Czubaszek, Piotr Banaszuk, Grzegorz Zając, Martin J. Wassen

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