LINK GOOGLE DEMO BOOK
https://books.google.com.br/books?id=E0a7CgAAQBAJ&lpg=PR4&ots=2UnSiLZ-v5&dq=The%20Committee%20of%20Japan%20Physics%20Olympiad%20OLYMPIAD%20PHYSICS%20Basic%20to%20Advanced%20Exercises&hl=pt-BR&pg=PP1#v=onepage&q&f=false
VERSION DEMO GOOGLE BOOK
LINK ORIGINAL ENCONTRADO EN LA WEB INSTITUTO OMEGALEPHT
https://www.dropbox.com/s/vjwjx33olxa0dbz/The-Committee-of-Japan-Physics-Olympiad-Physics-Olympiad-Basic-To-Advanced-Exercises-World-Scientific-Publishing-Company-2014.pdf