SOAP request - ref

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="urn:Project365APIWebServices" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<SOAP-ENV:Body>
<ns1:addCustomer>
<sid xsi:type="xsd:string">AYPJ6JAJJJJDRNDDHJAVP0XLWFPQWE6KSQ0Y812X73JUZTADU2</sid>
<customer xsi:type="ns1:Customer">
<CompanyID xsi:type="xsd:string">123456789</CompanyID>
<CompanyName xsi:type="xsd:string">Ufon s.r.o.</CompanyName>
<FirstName xsi:type="xsd:string">Franta</FirstName>
<LastName xsi:type="xsd:string">Jetel</LastName>
<contactPersons SOAP-ENC:arrayType="ns1:ContactPerson[1]" xsi:type="ns1:ArrayOfContactPerson">
<item xsi:type="ns1:ContactPerson">
<FirstName xsi:type="xsd:string">Aldik</FirstName>
<LastName xsi:type="xsd:string">Klimsa</LastName>
<contacts SOAP-ENC:arrayType="ns1:Contact[1]" xsi:type="ns1:ArrayOfContact">
<item xsi:type="ns1:Contact" id="ref1">
<Connection xsi:type="xsd:string">aldak@aldak.cz</Connection>
<contactType xsi:type="ns1:ContactType">
<ID xsi:type="xsd:long">3</ID>
<Name xsi:type="xsd:string">email</Name>
</contactType>
</item>
</contacts>
</item>
</contactPersons>
<contacts SOAP-ENC:arrayType="ns1:Contact[1]" xsi:type="ns1:ArrayOfContact">
<item href="#ref1"/>
</contacts>
</customer>
</ns1:addCustomer>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>