Anisotropy of Sommerfeld coefficient and penetration depth in superconducting 2H-NbS2 Geetanjali Purohit, Anup Pattanaik and Pratibindhya Nayak Eur. Phys. J. B, 91 1 (2018) 9 Published online: 12 January 2018 DOI: 10.1140/epjb/e2017-80450-7