- https://books.google.ru/books?id=kC9XDgAAQBAJ&pg=PA54&lpg=PA54&dq=GRNN+R+github&source=bl&ots=5wxvFdKmA0&sig=qnyya8g6xj9de_SiF435jnB0q20&hl=ru&sa=X&ved=0ahUKEwjIgryozdbTAhVE2SwKHYQsDtQ4FBDoAQgvMAI#v=onepage&q=GRNN%20R%20github&f=false
- http://easyneuralnetwork.blogspot.ru/2013/07/grnn-generalized-regression-neural.html