I have a conference paper published in A and now they have invited me to submit an extended version of the Paper in a Journal. Due to page limitations, I had a lot of work that I couldn't present at the conference.
Hence, can I include the excess work ONLY in the Journal and cite the conference paper OR do I need to include the entire conference paper and then the extra work?
Kindly help. As you may understand, I am entirely new to this.