A potential including the Heaviside function in the 1 + 1 dimensional hydrodynamics by Landau - Its basic properties and application to data at RHIC energiesT. Mizoguchi, H. Miyazawa and M. BiyajimaEur. Phys. J. A, 40 1 (2009) 99-108DOI: https://doi.org/10.1140/epja/i2008-10753-8