10.22034/irphe.1995.711603
10.22034/irphe.1995.711625
10.22034/irphe.1995.711626
10.22034/irphe.1995.711627
10.22034/irphe.1995.711628
10.22034/irphe.1995.711629
10.22034/irphe.1995.711630