@article{GDZPPN002079976, title = {On the diophantine equations 2y2 = 7k + 1 and x2 + 11 = 3n.}, journal = {Elemente der Mathematik}, volume = {34}, year = {1979}, pages = {119-121}, zbl = {0415.10013}, url = {http://dml.mathdoc.fr/item/GDZPPN002079976} }
Inkeri, K. On the diophantine equations 2y2 = 7k + 1 and x2 + 11 = 3n.. Elemente der Mathematik, Tome 34 (1979) pp. 119-121. http://gdmltest.u-ga.fr/item/GDZPPN002079976/