@Article{484403,
     author = "Krzysztof Borowski",
     title = "Analysis of Monthly Rates of Return in April on the Example of Selected World Stock Exchange Indices",
     year =  2016,
     volume =  11,
     number =  2,
     journal =  Equilibrium. Quarterly Journal of Economics and Economic Policy,
     pages =  s. 307-325,
    }