Distributed search in heterogenous databases (repositories) system in global network using Z39.50 standard. - Krasimir Trichkov (CompSysTech, 2003)

Standardization approach for information retrieval in WAN. - Krasimir Trichkov (CompSysTech, 2004)

Integrated information system based on web services. - Krasimir Trichkov; Elisaveta Trichkova; Elena Ivanova (CompSysTech, 2007)

Open source solution for workflow execution architecture. - Martin Tsenov; Krasimir Trichkov; Simeon Tsvetanov (CompSysTech, 2009)