hi Radu,
https://openui5beta.hana.ondemand.com/#docs/guide/753b32617807462d9af483a437874b36.html
This is a cool place to start.. Some of the guidelines are highly questionable, for instance Hungarian Notations (it's been known for such a long time they really don't help legibility of the code) - these are OpenUI5 guidelines but I reckon most people use them as well for developing ui5 applicaitons.
Hope it helps,
Dan.