APA 6th Edition Lapaine, M. (2002). Krivulja središta i krivulja fokusa u pramenu konika zadanom pomoću dviju dvostrukih točaka u izotropnoj ravnini. KoG, 6. (6.), 49-54. Preuzeto s https://hrcak.srce.hr/3939
MLA 8th Edition Lapaine, Miljenko. "Krivulja središta i krivulja fokusa u pramenu konika zadanom pomoću dviju dvostrukih točaka u izotropnoj ravnini." KoG, vol. 6., br. 6., 2002, str. 49-54. https://hrcak.srce.hr/3939. Citirano 25.01.2021.
Chicago 17th Edition Lapaine, Miljenko. "Krivulja središta i krivulja fokusa u pramenu konika zadanom pomoću dviju dvostrukih točaka u izotropnoj ravnini." KoG 6., br. 6. (2002): 49-54. https://hrcak.srce.hr/3939
Harvard Lapaine, M. (2002). 'Krivulja središta i krivulja fokusa u pramenu konika zadanom pomoću dviju dvostrukih točaka u izotropnoj ravnini', KoG, 6.(6.), str. 49-54. Preuzeto s: https://hrcak.srce.hr/3939 (Datum pristupa: 25.01.2021.)
Vancouver Lapaine M. Krivulja središta i krivulja fokusa u pramenu konika zadanom pomoću dviju dvostrukih točaka u izotropnoj ravnini. KoG [Internet]. 2002 [pristupljeno 25.01.2021.];6.(6.):49-54. Dostupno na: https://hrcak.srce.hr/3939
IEEE M. Lapaine, "Krivulja središta i krivulja fokusa u pramenu konika zadanom pomoću dviju dvostrukih točaka u izotropnoj ravnini", KoG, vol.6., br. 6., str. 49-54, 2002. [Online]. Dostupno na: https://hrcak.srce.hr/3939. [Citirano: 25.01.2021.]
Sažetak Conic section pencils given by two double points are discussed. It is proved that the curve of centres decomposes into two straight lines, one of which is passing through the two double base points, while the other is passing through the intersection of common tanget lines of all conics of the pencil and through the centre of the straight segment joining the base points. Furthermore, it is proved that the curve of all isotropic focal points decomposes into a straight line and a conic. These straight line and conic are passing through the double base points of pencil, and the conic through the intersection of common tangent lines of all conics of the pencil.