On the Empirical Linkages between Stock Prices and Trading Activity on the German Stock Market. - Roland Mestel; Henryk Gurgul; Pawel Majdosz (OR, 2004)

The informational content of insider trading disclosures: empirical results for the Polish stock market. - Henryk Gurgul; Pawel Majdosz (Central Eur. J. Oper. Res., 2007)