Quibus in casibus integralium ordinariorum quae aequationi differentiali: x(x-1)d²y/dx² + (([alpha] + [beta] + 1)x-[gamma])dy/dx + [alpha][beta]·y = 0 satisfaciunt, alterum aut alteri aequale aut infinitum evadat . - Winterberg, Constantin, 1841- (typis expressit G. Lange (P. Lange), 1874)