ventsislav zankov, PhD
vzankov[at]yahoo.com
http://zankov.info
mobile: +359 887 51 97 94
post: P.O.Box 223
1618 Sofia
Bulgaria
ventsislav zankov, PhD
vzankov[at]yahoo.com
http://zankov.info
mobile: +359 887 51 97 94
post: P.O.Box 223
1618 Sofia
Bulgaria