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If the articles seem like they wouldn't apply to a puppy then I probably wouldn't use them as they maybe don't employ methods that should be used with resource guarding or behavior modification more generally.
There are a lot of Golden puppies who resource guard - it's actually somewhat normal considering what puppies/dogs do naturally. However, it seems that your pup's guarding is a little beyond the norm.
The first thing to understand is that resource guarding is an issue of trust. Your pup doesn't trust that the item will be given back if it is taken away. That could happen if you are consistently taking things away without giving them back, especially by force. Unfortunately that is often the method recommended by many sources. If you are using general training methods that require force or intimidation it can further help break down your relationship.
If you haven't already done so start using positive reinforcement such as trading for another item such as a toy or treat for anything your pup has including clumps of grass. Also, kind of like sitting next to him and petting him while he's eating but more safely, you can toss a yummy piece of hot dog in the bowl while he's eating to teach him that good things come from you. It takes time but it will fix the issue eventually.
Here is the best resource on the market if you feel you can handle this on your own:
"MINE!" by Jean Donaldson - sold as an EBook too and cheap! Welcome to Dogwise.com
Keep all food out of reach. You can teach a dog to stay out of the kitchen area using consistent reinforcement. Avoid really high value items like Bully Sticks until you've got this under control.
Have you had a chance to attend socialization/puppy classes? I would encourage you to get into class or private lessons with a CPDT if you're in North America.
Importantly, stay safe. Do not let guest, children or other pets approach the dog during toy or meal time. Respect the puppy's communication that he's not feeling safe and never push him over threshold to the point where he feels he must communicate with aggression.