Marketing activities of Polish internet retailers. - Piotr Drygas; Marek Kowalkiewicz; Marcin Paprzycki (IADIS AC, 2005)

In search of values in internet shopping-method and preliminary research. - Jacek Wachowicz; Piotr Drygas (IMCSIT, 2008)

Effective Properties of Fibrous Composites and Cluster Convergence. - Vladimir Mityushev; Piotr Drygas (Multiscale Model. Simul., 2019)

Left Ordinal Sums of Fuzzy Implications and Their Natural Negations. - Anna Król; Pawel Drygas; Piotr Drygas; Piotr Molenda; Piotr Pusz (KES, 2024)

Constructive Homogenization Of Dispersed Random Composites. Part I. Theory. - Vladimir Mityushev; Piotr Drygas (ECMS, 2025)