http://repositorio.unc.edu.pe/bitstream/handle/UNC/1640/TESIS%20RFG%202015.pdf?sequence=1&isAllowed=y https://geologiaweb.com/ingenieria-geologica/estudios-geotecnicos/ensayo-spt/ https://www.geotecnia.online/correccion-del-spt-y-correlaciones-empleando-el-software-sptcorr/ https://www.youtube.com/watch?v=n2190Lgl3pQ https://www.google.com/search?q=correccion+por+relacion+de+energia&rlz=1C1SQJL_esPE793PE793&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjD1si_0f7nAhWumuAKHbCQDPwQ_AUoAXoECAsQAw&biw=1600&bih=740#imgrc=8gVKTnLWr7dkKM https://slideplayer.es/slide/2922874/ https://www.google.com/search?q=martillo+cilindrico+spt&tbm=isch&source=iu&ictx=1&fir=NFZx6ARdRBgE-M%253A%252CKKJ9xAZ2U0oBWM%252C_&vet=1&usg=AI4_-kTNcEKIFpZ5EBYfWA4ah1nWSmakQA&sa=X&ved=2ahUKEwjmp9Ca1v7nAhXHct8KHWhMDRUQ9QEwAnoECAkQCQ#imgrc=NFZx6ARdRBgE-M