@article{MV_1965_17_4_a1,
     author = {M. S. Popadi\'c},
     title = {On the general induction principle},
     journal = {Matemati\v{c}ki vesnik},
     pages = {233 },
     year = {1965},
     volume = {17},
     number = {4},
     url = {http://geodesic.mathdoc.fr/item/MV_1965_17_4_a1/}
}