EX-4 2 0002.txt JOINT FILING CERTIFICATION CERTIFICATION REGARDING JOINT FILING OF SCHEDULE 13D PURSUANT TO RULE 13D-1(F) OF THE SECURITIES AND EXCHANGE COMMISSION Alan S. Cohn and Robin Cohn do hereby certify that the Schedule 13D to which this certification is attached as Exhibit 4 is being filed with the Securities and Exchange Commission on behalf of each of the undersigned. June __, 2000. /s/ Alan S. Cohn ----------------------------------------- Alan S. Cohn /s/ Robin Cohn ----------------------------------------- Robin Cohn