How to open a pdf file in Adobe Reader using URL scheme on iOS devices

To open a pdf files in Adobe Reader on iOS devices,
I created url links as follows:

com.adobe.Adobe-Reader://mysite.com/myfile.pdf
com.adobe.reader.request://mysite.com/myfile.pdf

But none of these does work.
Adobe Reader starts up but never opens pdf files.

Does anyone know how to write URL scheme?

Thanks in advance.