Jonoska, J. M. L. J. M. (1977). MOIRE FRINGES OF TWO SYSTEMS OF CONCENTRIC HOMOTHETIC SECOND ORDER CURVES WHOSE SEMIAXES REFER TO EACH OTHER AS THE SQUARE ROOTS OF THE INTEGERS. Matematichki Bilten, 27(1). https://bilten.smm.org.mk/index.php/bilten/article/view/1382