Chess Variation by John Gollon, "Giveaway Chess I", pp. 230-231, Charles E. Tuttle Co., 1974. |
H. Murray, A History of Chess, Oxford Press, 1913, pp. 341, 347. |
J. Gollon, Chess Variations, Chas. Thomas, Rutland, VT., 1968, pp. 59-67, 177-187, 214-218, and 219-222. |
A. Dickins, A Guide to Fairy Chess, Q Press, Richmond, (Surrey) England, 1969, pp. 8, 9, 31, 49, 65 and 66. |
A. Dickins, A Short History of Fairy Chess, F. Bailey & Son, Dursley, England, 1975. |
H. Davidson, A Short History of Chess, McKay, New York, 1981, pp. 102-107. |
J. Capablanca, Brighter Chess, Why Changes Should Be Made, Chess Amateur, Nov. 1929, pp. 44-45. |
E. Lasker, Chess Secrets I Learned from the Masters, pp. 427-428, D. McKay, New York, 1951. |