From OO to FPGA: Fitting round objects into square hardware?: https://web.cs.ucla.edu/~palsberg/paper/oopsla10.pdf
Vertical Object Layout and Compression for Fixed Heaps: https://web.cs.ucla.edu/~palsberg/paper/cases07.pdf
Virgil: Objects on the Head of a Pin: https://escholarship.org/content/qt13r0q4fc/qt13r0q4fc.pdf
I found these with https://scholar.google.com/.