Experimental study of magnetocaloric effect in tetraaquabis(hydrogen maleato)nickel(II), [Ni(C4H3O4)2(H2O)4]—A potential realization of a spin-1 spatially anisotropic square lattice with ferromagnetic interactions / Petro Danylchenko, Róbert Tarasenko, Erik Čižmár, Vladimír Tkáč, Anna Uhrinová, Alžbeta Orendáčová, Martin Orendáč KE304