Babinkostova L,Kocinac Ljubisa DR,Scheepers M (2007) Combinatorics of open covers (XI): Menger- and Rothberger-bounded groups, TOPOLOGY AND ITS APPLICATIONS, vol. 154, br. 7, str. 1269-1280 (Article) 

Babinkostova L,Kocinac Ljubisa DR,Scheepers M (2005) Notes on selection principles in topology (I): Paracompactness, JOURNAL OF THE KOREAN MATHEMATICAL SOCIETY, vol. 42, br. 4, str. 709-721 (Article) 

Babinkostova L,Kocinac Ljubisa DR,Scheepers M (2004) Combinatorics of open covers (VIII), TOPOLOGY AND ITS APPLICATIONS, vol. 140, br. 1, str. 15-32 (Article) 

Kocinac Ljubisa DR,Scheepers M (2003) Combinatorics of open covers (VII): Groupability, FUNDAMENTA MATHEMATICAE, vol. 179, br. 2, str. 131-155 (Article) 

Kocinac Ljubisa DR,Scheepers M (2002) Function spaces and a property of Reznichenko, TOPOLOGY AND ITS APPLICATIONS, vol. 123, br. 1, str. 135-143 (Article)