How to import grouped products with Associated SKUs via CSV file in Magento 1.9.3.7

[nandoedilf5de1]

As the title says, I want to import via CSV, as I already do with simple products, a list of grouped products and the associated simple products. Can anyone tell me the syntax to use and the fields to use in the csv file?

Here is the example with the fields I use normally with simple products:

https://docs.google.com/spreadsheets/d/1pll7xKTs2p-SKRjyTgY5DbDwVzE_nx--VQMnB26IPgc/edit?usp=sharing