Professor Henrique Gaspar's support material:
NASA Systems Engineering Handbook (2007 version) - https://soma.larc.nasa.gov/mmx/pdf_files/NASA-SP-2007-6105-Rev-1-Final-31Dec2007.pdf
SEAri MIT Legacy Site (up to 2021): https://seari.mit.edu/publications.php
Rhodes & Ross 2010: https://seari.mit.edu/documents/preprints/RHODES_EUSEC10.pdf
Gaspar et al. 2012: https://www.dropbox.com/scl/fi/swqzihw6u4o48hod5aadu/Gaspar-et-al-Transactions-SNAME-v120-2012.pdf?rlkey=mzfnk5orptdk5e4xlwaydxhjk&dl=0
Gaspar et al. 2015: https://seari.mit.edu/documents/preprints/GASPAR_IMDC15.pdf
Simon 1962 "The Architecture of Complexity": https://faculty.sites.iastate.edu/tesfatsi/archive/tesfatsi/ArchitectureOfComplexity.HSimon1962.pdf