Ah, is just noticed this topic. I posted this in the other Kauka-forum:
Hello!
Could you tell me where you got the info on Josep Nebot on the Kaukapedia?
http://www.kaukapedia.com/index.php/Josep_Nebot
My Spanish contact informed me that he also had a brother, Joan Nebot, who drew for the Spanish market. According to the signature, Nina (Cia. General Ediciones) should be drawn by Joan, who worked for Bruguera, a.o. Did you get the credit for Josep firsthand?