here :
https://hexagongeospatial.fluidtopics.net/en/book#!book;uri=f2790e0ca81311531f1a57c6b7bc80b2;breadcrumb=2e86bd898d02a646f3e7e68868433e3c-efd076f1f846e15d938beec0f4d6994f-257c7f0fe0b58554a35e39946fe34d2b
but for maximum output, you need to make not only one, but perform more than two or three trial and compare it.